Q: Define and give examples of the following: invasive species, dominant species, keystone species and ecosystem engineers.
Answers
Non-native organisms that spread rapidly in a new habitat, often causing harm to the native species and ecosystems. Species that have a major influence on the structure and functioning of their ecosystem due to their high abundance or biomass.
Species that play a crucial role in maintaining the structure of an ecosystem, despite their relatively low abundance or biomass. Their removal can cause significant changes to the ecosystem. Species that physically modify the environment, creating or modifying habitats for other species.
Sure! Here are the definitions and examples of each of the terms you mentioned:
1. Invasive species: An invasive species is a non-native organism that causes harm to the ecosystem it invades. These species often have no natural predators or competitors in their new environment, allowing them to thrive and outcompete native species. Examples include the zebra mussel in the Great Lakes and the Japanese knotweed in the United Kingdom.
2. Dominant species: A dominant species is the most abundant or influential species in an ecosystem. These species often have a large impact on the ecosystem, affecting other species' populations and the physical structure of the environment. Examples include oak trees in many North American forests and kangaroos in the Australian outback.
3. Keystone species: A keystone species is a species that has a disproportionately large effect on the ecosystem compared to its abundance. Removing a keystone species can cause significant changes to the ecosystem, often resulting in a decrease in biodiversity. Examples include sea otters in kelp forests and wolves in Yellowstone National Park.
4. Ecosystem engineers: Ecosystem engineers are species that physically modify the environment, creating new habitats or changing the conditions for other species. These species often have a large impact on the ecosystem, similar to keystone species. Examples include beavers, who create dams that create wetlands, and coral reefs, which are created by coral polyps.
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Related Questions
When would a cell use Passive Transport? Mark all that apply. o When the cell needs to move a compound that cannot move freely through the membrane. o When the cell needs to move a compound against its concentration gradient. o When the cell needs to move a compound down its concentration gradient.
Answers
A cell would use Passive Transport when it needs to move a compound down its concentration gradient.
What is Passive Transport?Passive transport is a kind of transport that happens when materials move from an area of higher concentration to an area of lower concentration without the input of external energy. It is dependent on the concentration gradient which is a difference in concentration between two areas. This movement occurs because of the kinetic energy of the molecules involved. Passive transport is used by cells to move substances across the cell membrane without using energy. It can occur through different methods, such as diffusion, facilitated diffusion, and osmosis.
When would a cell use Passive Transport?A cell would use Passive Transport when it needs to move a compound down its concentration gradient. It implies that the substance in question has a higher concentration in one area of the cell than another. Hence, the molecule would pass through the membrane down the concentration gradient from a region of high concentration to an area of low concentration without any input of energy.
The other two options are not appropriate as when the cell needs to move a compound that cannot move freely through the membrane and when the cell needs to move a compound against its concentration gradient, active transport mechanisms are employed by the cell. These methods require energy in the form of ATP to function.
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C-banding is a pattern of staining using giemsa stain in which chromosomes show staining of?
Answers
Giemsa stain shows the staining of centromeres.
C-banding, which involves denaturing the chromosomes in a saturated alkaline solution followed by Giemsa staining, is a technique specifically used to identify heterochromatin. Different banding methods can be selected when identifying chromosomes. Chromosome banding is an important technique used in chromosome karyotyping to distinguish between normal and defective chromosomes for clinical and scientific purposes.The most common dye-based chromosome banding methods are Giemsa (G), reverse (R), and centromere (C). G-banding stains trypsinized chromosomes, whereas R-banding uses hot acidic saline to denature the chromosomes prior to Giemsa staining. It contains a significant amount of AT-rich satellite DNA. Just as G-banding represents AT-rich sections of chromosomes, so does Q-banding.Therefore, centromeres is the correct answer.
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the abiotic conditions under which a species can survive and reproduce is called its range of tolerance. realized niche. environmental distribution. fundamental niche.
Answers
A species' fundamental niche is the set of abiotic circumstances in which it can coexist and procreate. The complete spectrum of environmental circumstances is a fundamental niche.
that a healthy population of the species can live there. All of an ecosystem's nonliving components are referred to as abiotic elements. Let's analyze the word. The core word bio has the meanings "life" and "alive," whereas the prefix a- has the meaning "not." So, "abiotic" simply means "not living."
Contrarily, the "fundamental niche" that an organism actually fills is frequently far less resource-efficient due to the presence of rival species, intraspecific conflict, predation, and environmental challenges that hinder the acquisition of the resources.
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which of the following causes cytokinesis in animal cells ? group of answer choices the contraction of a band of actin filaments around the circumference of the cell. the movement of mitotic spindle microtubules. the sliding movement of a band of microtubules around the circumference of the cell. rho a mediated endocytosis of vesicles into the plasma membrane. fusion of cytoplasmic membrane vesicles at the equator of the cell.
Answers
The contraction of a band of actin filaments around the circumference of the cell causes cytokinesis in animal cells.
Cytokinesis is the process of cell division that involves the division of the cytoplasm and the separation of the daughter cells that occur following mitosis or meiosis. Cytokinesis in animal cells is a bit different from plant cells as it is based on the formation of a contractile ring that encircles the cell and eventually causes it to split into two cells. During the anaphase of mitosis or meiosis, the chromosomes move to opposite poles of the cell due to the pulling action of microtubules that attach to the chromosomes.
Once the chromosomes are fully separated, the cell prepares to divide by undergoing cytokinesis, which involves the formation of a contractile ring consisting of actin filaments and myosin II that form around the cell's midsection. The actin-myosin ring then contracts, causing the cell to pinch inwards and eventually divide into two new cells. In summary, the contraction of a band of actin filaments around the circumference of the cell causes cytokinesis in animal cells.
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Rather than attempting to classify humans into racial categories, biologists and anthropologists are:_________
Answers
Rather than attempting to classify humans into racial categories, biologists and anthropologists are: seeking to explain why specific biological variations occur
What are biological variations?
Biological variety is important to all our lives. Our world is home to a wide variety of life forms thanks to diversity. For each species to survive and find a niche in which to flourish, diversity is crucial. Without delving into the idea of evolution, diversity within our own species is evident in a number of observable traits, like height, and functional traits, such as the capacity for biotransformation. The pharmacogenomics discipline is emerging as a result of the latter source of variability. Unfortunately, biological diversity makes it difficult to examine the effects of treatments, even when the trial is planned and overseen beforehand. There is always a range of reactions shown in measurements conducted on study animals, regardless of how inbred they are.
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Can someone help me with this question rq :)
Answers
Answer:
What is it?
Explanation:
why it is so important for the body to be protected against viral pathogens?
Answers
Answer:
Certain viral pathogens can lead to death. Viruses like Human Immunodeficiency Viruses (HIV) are not considered lethal on their own but lower your body's ability to fight infections, and over time cause Acquired Immunodeficiency Syndrome (AIDS). If infected by this virus you could be killed by the common cold. That is why it is important to be protected against viral pathogens.
Explanation:
An astronaut is planning a trip to a newly-discovered planet according to the law of universal gravitation, the astronaut weight in the new planet will be greater than his weight on earth if:
Answers
The new planet has more mass than Earth but the same radius. The mass of the astronaut will be calculated by the use of Newton's gravitational equation. The weight of the astronaut depends completely on its mass and the gravitational acceleration of the planet.
Gravitational acceleration is directly proportional to the mass of the planet and indirectly proportional to the radius of the planet. Hence, when the gravitational acceleration increases the planet's mass will increase therefore the radius will decrease. The astronaut's mass will depend on these factors.
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amylose and amylopectin are the principle storage polysaccharides of:
Answers
Amylose and amylopectin are the principal storage polysaccharides of starch, which is a complex carbohydrate found in plants.
Starch serves as an energy reserve for plants, allowing them to store excess glucose produced through photosynthesis.
Amylose: Amylose is a linear polymer of glucose molecules linked together by α-1,4 glycosidic bonds. It forms a long, unbranched chain structure. The glucose molecules in amylose are oriented in a helical structure, which allows for compact packing. Amylose accounts for about 20-30% of starch and is less soluble in water compared to amylopectin.
Amylopectin: Amylopectin is a branched polymer of glucose molecules linked by both α-1,4 glycosidic bonds and α-1,6 glycosidic bonds. It has a highly branched structure with side chains arising from the α-1,6 linkages. This branching gives amylopectin a more open and highly branched structure compared to amylose. Amylopectin accounts for the remaining 70-80% of starch and is more soluble in water due to its branched structure.
Both amylose and amylopectin serve as a readily accessible source of glucose for plants. When plants require energy, enzymes break down starch into its constituent glucose molecules, which can then be used in metabolic processes such as respiration or converted into other molecules for growth and development.
It's worth noting that in addition to plants, starch is also an important dietary carbohydrate for humans and animals. When consumed, starch is broken down into glucose by digestive enzymes, allowing for efficient absorption and utilization of energy in the body.
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Data:
Record the data from each trial in the data chart below. Be sure to fill in the chart completely.
Test One
Parent 1:
Parent 2: Ff
Phenotype ratio:
________ : ________
short fur : long fur
Test Two
Parent 1: Ff
Parent 2: Ff
Phenotype ratio:
________ : ________
short fur : long fur
Test Three
Parent 1: ff
Parent 2: ff
Phenotype ratio:
________ : ________
short fur : long fur
Answers
If the parents are both ff, then the offspring will be ff because both the alleles are recessive.
What are the possible genotypes and phenotypes of Parent 1: Ff and Parent 2: Ff ?The two parents have the genotype Ff, which means they are both heterozygous for the same gene.
Each parent can produce two types of gametes, one with the dominant F allele and one with the recessive f allele. Therefore, the possible gametes that each parent can produce are:
Parent 1: F or f
Parent 2: F or f
To determine the possible offspring genotypes, we can use a Punnett square. The Punnett square for this cross would look like:
| F | f
--|----|---
F | FF | Ff
--|----|---
f | Ff | ff
From the Punnett square, we can see that there are three possible genotypes of offspring: FF, Ff, and ff.
The genotype FF represents homozygous dominant offspring
The genotype Ff represents heterozygous offspring
The genotype ff represents homozygous recessive offspring
The probability of each genotype occurring is:
25% chance of FF genotype
50% chance of Ff genotype
25% chance of ff genotype
So, the possible offspring genotypes are FF, Ff, and ff with a ratio of 1:2:1.
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Identify the form carbón takes in the biosphere, hydrosphere geosphere and atmosphere
Answers
Hydrosphere: stored in organic compounds trapped in living organisms and in the soil
Geosphere: stored in rocks, fossil fuels, and magma
Atmosphere: stored in rocks and sediments. Also the deep ocean
Bacteria of species A and species B are kept in a single environment, where they are fed two nutrients. Each day the envirunment is supplied wath 19,520 unta of the first nutrient and 31,430 units of the second nutrient. Each bacterium of species A requires 4 units of the fims nutrient ard 5 units of the second, and each bacterium of species B requires 1 unit of the first nutrient and 6 units of the second. What populations of each species can coexist in the enviranment so that ail the nutrients are consumed each day? x of species A x of species B
Answers
The populations of species A and species B that can coexist in the environment are 3,880 of species A and 2,520 of species B.
To determine the populations of species A and species B that can coexist while consuming all the nutrients each day, we need to calculate the nutrient requirements and compare them with the available nutrient supply. Each bacterium of species A requires 4 units of the first nutrient and 5 units of the second nutrient, while each bacterium of species B requires 1 unit of the first nutrient and 6 units of the second nutrient.
Let's start by calculating the total nutrient requirements for each species. For species A, the total nutrient requirement for the first nutrient would be 3,880 (number of species A bacteria) multiplied by 4 (units of the first nutrient per bacterium), which equals 15,520 units. Similarly, the total nutrient requirement for the second nutrient would be 3,880 multiplied by 5, which equals 19,400 units.
For species B, the total nutrient requirement for the first nutrient would be 2,520 (number of species B bacteria) multiplied by 1 (unit of the first nutrient per bacterium), which equals 2,520 units. The total nutrient requirement for the second nutrient would be 2,520 multiplied by 6, which equals 15,120 units.
Now, let's compare these total nutrient requirements with the available nutrient supply. We have 19,520 units of the first nutrient and 31,430 units of the second nutrient. Since the total nutrient requirements for both species A and species B are lower than the available nutrient supply, it is possible for populations of 3,880 of species A and 2,520 of species B to coexist in the environment while consuming all the nutrients each day.
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Which type of large-scale environmental impacts are the most detrimental? Is all human impact on the environment negative? How can we prevent the occurrence of large-scale, negative environmental impacts?”
Answers
Answer:d all of the above
Explanation:
What contains biopesticides?
chemicals designed to kill plants
forests after an infestation has taken over
species of insects that are immune to other pesticides
all plants because they are a naturally occurring element
Answers
Biopesticides are specific forms of insecticides made from natural substances like bacteria, plants, animals, and minerals.
The correct answer is :C.
Which four biopesticides are there?Pyrethrum, rotenone as neem oil, and other essential oils are four distinct kinds of substances that exist naturally that control (or track, in the instance of pheromones) pests or microbial disease. These compounds are used commercially.
What are the components of biopesticides?Natural derivatives known as "bio pesticides" are produced utilising biological raw materials derived from plants, animals, microbiological organisms, and minerals. The bio insecticides are highly effective at eliminating pests, weeds, and other pathogens and have been optimized for usage employed for both liquid and dry formulations.
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To draw a perfect circle, you'll need: A A protractor B. A sextant С A compass D A spirograph 10 of 10
Answers
Answer:
d. a compass probobly
Explanation:
Model.
C. Explain ONE economic reason why a corporation based in an English-speaking country was
locate a call center in a country where English is not the dominant language.
Answers
Lower labor costs in non-English speaking countries can significantly reduce expenses for corporations, increasing profitability and global competitiveness.
One economic reason for a corporation based in an English-speaking country to locate a call center in a country where English is not the dominant language is to take advantage of lower labor costs.
In many non-English speaking countries, wages for call center employees are considerably lower compared to English-speaking countries. By outsourcing call center operations to these countries, corporations can significantly reduce their operational expenses.
This cost-saving measure allows companies to increase profitability and remain competitive in the global market, while still providing customer support services in English by hiring bilingual or multilingual employees.
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What is a cell? Can you define it, please?
Answers
Answer:
La célula (del latín cellula, diminutivo de cella, ‘celda’)1 es la unidad morfológica y funcional de todo ser vivo. De hecho, la célula es el elemento de menor tamaño que puede considerarse vivo.2 De este modo, puede clasificarse a los organismos vivos según el número de células que posean: si solo tienen una, se les denomina unicelulares (como pueden ser los protozoos o las bacterias, organismos microscópicos); si poseen más, se les llama pluricelulares. En estos últimos el número de células es variable: de unos pocos cientos, como en algunos nematodos, a cientos de billones (1014), como en el caso del ser humano. Las células suelen poseer un tamaño de 10 µm y una masa de 1 ng, si bien existen células mucho mayores.
Célula animal
La teoría celular, propuesta en 1838 para los vegetales y en 1839 para los animales,3 por Matthias Jakob Schleiden y Theodor Schwann, postula que todos los organismos están compuestos por células, y que todas las células derivan de otras precedentes. De este modo, todas las funciones vitales emanan de la maquinaria celular y de la interacción entre células adyacentes; además, la tenencia de la información genética, base de la herencia, en su ADN permite la transmisión de aquella de generación en generación.4
Explanation:
Answer:
A cell is the smallest unit of life. Cells consist of cytoplasm enclosed within a membrane, which contains many biomolecules such as proteins and nucleic acids. There are probably up to 1000000000 cells in the human body and they are multiplying every minute. dead cells turn into hair, dust, dead skin. You can notice when it's dead because if you pinch a certain part of your body and it doesnt hurt, that part is dead.
6. Charles Darwin is given credit for being the true father of the Theory of Natural Selection. Alfred
Wallace is also sometimes given partial credit for coming to the same conclusion without ever talking
with Charles Darwin. Which of the following statements is NOT part of the Darwin-Wallace Theory
of Natural Selection?
Answers
There is no statement that is NOT part of the Darwin-Wallace theory of natural selection.
What is Darwin-Wallace theory of natural selection?The Darwin-Wallace theory of natural selection includes the following four statements:
Individuals within a population exhibit variation in traits.Some trait variations are heritable, meaning they can be passed down from one generation to the next.More offspring are produced than can survive, leading to a struggle for existence.Individuals with advantageous traits are more likely to survive and reproduce, passing on those traits to their offspring.Therefore, the answer to your question is that there is no statement that is NOT part of the Darwin-Wallace theory of natural selection.
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in one paragraph explain the respiratory system
Answers
Hope this help
reeder-hayes k, peacock hinton s, meng k, carey la, dusetzina sb. dis‑ parities in use of human epidermal growth hormone receptor 2-targeted therapy for early-stage breast cancer. j clin oncol of j am soc clin oncol. 2016;34:2003–9.
Answers
The study examined the disparities in the utilization of human epidermal growth hormone receptor 2 (HER2)-targeted therapy in early-stage breast cancer.
This study focused on investigating the discrepancies in the utilization of HER2-targeted therapy for early-stage breast cancer. HER2-targeted therapy, such as trastuzumab, has revolutionized the treatment of HER2-positive breast cancer by significantly improving outcomes. Disparities in treatment access and use have been observed among different patient populations, and this study aimed to address these disparities.
The researchers examined factors such as age, race/ethnicity, socioeconomic status, and geographic location to understand the underlying reasons for disparities in HER2-targeted therapy utilization. They analyzed data from patient records and treatment databases to assess the rates of HER2-targeted therapy utilization among different groups.
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how do veins differ arteries and capilleries in their structure and function
Answers
Hello,
Vascular smooth muscle (VSM), which is present in ALL arteries regardless of size, has a different role depending on the kind of artery. Similar to a stretched rubber band returning to its original size, a major conduit artery like the aorta has a lot of elastic tissue inside of it, which enables it to expand during systole and then elastically recoil to shrink back to its original diameter during diastole. This function smooths out the difference between systolic and diastolic pressures during each cardiac cycle, preventing systemic blood pressure from experiencing as much variation in pressure as the Because of this, we refer to the major arteies as acting as a pressure reservoir.
The VSM becomes increasingly significant as arteries narrow, and by the time you reach the arterioles, the so-called resistance vessels, you have VSM capable of causing significant changes in artery width. This is what regulates blood pressure and blood flow to certain tissues. Both the autonomic nervous system and regional cues from the tissue being fed play a complicated role in controlling artery VSM.
Capillaries are just a single layer of endothelial cells backed by some basement membrane; they lack a VSM and elastic tissue. Due to their extreme thinness, they serve their primary purpose as exchange vessels, which allows for the quick exchange of nutrients, wastes, and gases (O2, CO2). functioning as a pressure reservoir.
Veins serve as a large volume reservoir for the cardiovascular system because they have less elastic tissue than arteries and are more compliant (they stretch easier). In fact, the venous system contains around 70% of all blood volume at any given time. Veins are therefore referred to as "capacitance vessels" for this reason. Veins also have autonomic-controlled VSM that can contract, sending more blood back to the heart so that more can be put into the arterial system—for example, during emergency situations like major blood loss or during exercise. This volume reservoir can be used as needed. Return of blood to the heart (so-called venous return) is also helped by veins' compliance--as muscles contract, they can easily squeeze the veins, to propel blood back to the heart, and their one-way valves ensure that the flow goes one way.
Thanks,
Eddie
Answer:
Explanation:
Arteries transport blood away from the heart. Veins return blood back toward the heart. Capillaries surround body cells and tissues to deliver and absorb oxygen, nutrients, and other substances. The capillaries also connect the branches of arteries and to the branches of veins.
Once you've completed your virtual lab, apply what you have learned about the scientific method and the
scientific process by answering the following questions. Since you are only doing a few experiments, your
answers will be more in line with the "exploration and discovery" and the "testing ideas".
1. Describe what part of the virtual experiment relates to the exploration and discovery part of the
scientific process.
I
Answers
If you've ever witnessed anything and questioned why or how it occurred, you've begun the journey of discovery.
what is a virtual lab ?
A virtual laboratory is an on-screen simulator or calculator that allows you to put ideas to the test and examine the outcomes. Learners employ innovative technology to conduct a series of experiments that produce real-world effects. For example, students can "tinker" with laboratory equipment that performs almost exactly like it would in real life.
If you've ever witnessed anything and questioned why or how it occurred, you've begun the journey of discovery. If you continue on your adventure, you will most likely come up with some of your own solutions to your query. Even farther down the road, you can consider how to determine whether your responses are right. Whether you realise it or not, you are now pursuing a route known to scientists as the scientific method. You have very nearly finished all a scientist might do in a laboratory or out in the field when undertaking research if you conduct some experiments to check whether your answer is right and write down what you discover in a report.
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The medium of a wave is________.
Select one:
a.
a dashed line indicating the resting position of the wave
b.
where the average position of the wave is located
c.
what the wave is traveling through
d.
the middle point of the wave
Answers
The medium of a wave is what the wave is traveling through.
What is Wave?
A wave is a dynamic disturbance that propagates and causes one or more quantities to depart from equilibrium.
A traveling wave is one in which the entire waveform moves in one direction; in contrast, a standing wave is one in which two periodic waves are overlaid and move in the opposing directions.
In a standing wave, there are some points where the wave amplitude seems reduced or even zero, and these positions have null vibration amplitudes. A wave equation (standing wave field comprising two opposing waves) or a one-way wave equation (for single wave propagation in a certain direction) is frequently used to describe waves.
Therefore, The medium of a wave is what the wave is traveling through.
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Darwin was greatly influenced by contemporary geologists such as hutton and lyell. which of their ideas was the main influence on darwin's thinking?
Answers
James Hutton and Charles Lyell, both geologists, believed that slow, persistent acts that are still in effect today can cause changes in the Earth's surface. According to Lyell's uniformitarianism concept, the mechanisms of change remain consistent over time. This point of view had a big impact on Darwin's ideas.
Who is Darwin?English naturalist, geologist, and biologist Charles Robert Darwin is well recognized for his contributions to evolutionary biology. His theory that all living things share a common ancestry is now widely recognized and regarded as a fundamental idea in science.
He presented the scientific theory that this branching pattern of evolution resulted from a process he called natural selection, in which the struggle for existence has a similar effect to the artificial selection involved in selective breeding. He published this theory in a joint publication with Alfred Russel Wallace. One of the most influential people in human history, Darwin was honored by being buried in Westminster Abbey
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Which activity contributes to an increase in the concentration of greenhouse
gases in the atmosphere?
Answers
Answer:
D. Deforestation
Explanation:
Loss of forests contributes as much as 30 percent of global greenhouse-gas emissions each year--rivaling emissions from the global transportation sector.Hopes this helps. :)
Answer:
D
Explanation:
Just took the quiz
19. Mendel correctly concluded that offspring receive___ “Heritable factors" for each trait - one from each parent.
20. When ____ (sperm and egg cells) form, only _____of the two factors for each trait is given to a gamete.
21. The 2 gametes fuse during____so the resulting offspring has
for each trait.
22. Today these "heritable factors" are called____
Answers
Mendel correctly deduced that children inherit "heritable factors"—one from each parent—for each feature. These elements are now known as genes.
What is Gamete?
Only one of the two components for each trait is provided to a gamete when it forms (sperm and egg cells).
After fertilization, the two gametes merge, resulting in an offspring with two components (alleles) for each trait.
What is Heritable factors?These "heritable factors" are known as genes today.
The degree to which genetic variations among persons may adequately explain the variations in their attributes is known as heritability. Characteristics like height, eye color, and IQ are examples of traits, as are illnesses like schizophrenia and autism spectrum disorder.
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2. The puppy jumps into my lap whenever he wants to play, and licks my face. A. Simple Sentence C. Compound Sentence B. Complex Sentence D. Compound-Complex Sentence
Answers
Answer: Compound-complex sentence
Explanation:
8. Which of the following is NOT an example of potential energy?
A. A running woman
B. A compressed spring
C. An apple dangling off a branch
D. A candy bar
Answers
Answer:
A running woman
Explanation:
A running woman is not an example of potential energy because potential energy is stored energy that is not yet being used. A running woman is using energy and is not storing it.
What acid can go through plastic and flooring?
Answers
Answer:
Hydrofloride acid
Explanation:
Hydrofluoric acid is a highly corrosive acid, capable of dissolving many materials, especially oxides. Because of its high reactivity toward glass and moderate reactivity toward many metals.
determine the correct answer
* sphinchter muscle block urine as it"
1- voulantry muscle
2-sync with urinary bladder muscle
3_it will relax to exert urine
4-all the aaboe
Answers
Option 2. The sphincters' muscle block urine as it sync with urinary bladder muscle
What does the sphinchter muscle do?The sphincter muscle is a ring-shaped muscle that surrounds the urethra, the tube that carries urine from the bladder out of the body. There are two sphincter muscles that control the flow of urine: the internal sphincter, which is made up of smooth muscle and is under involuntary control, and the external sphincter, which is made up of skeletal muscle and is under voluntary control.
The sphincter muscle works in coordination with the bladder muscle to control the flow of urine. When the bladder is full, the bladder muscle contracts to expel urine, while the internal sphincter muscle relaxes to allow urine to pass through the urethra. The external sphincter muscle remains contracted to maintain continence.
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