exchange of gases in the human breathing system takes place in the?
Answers
alveoli
ExplanationDuring gas exchange oxygen moves from the lungs to the bloodstream. ... This happens in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.
The exchange of gases takes place in the alveoli.
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Additional information :- Alveoli are microscopic air sacs. They are the primary sites of exchange of gases. Gas exchange also occurs in lungs and tissues by diffusion.Atmospheric air contains little CO2, but blood flowing in pulmonary capillaries has a higher concentration of CO2.CO2 diffuses from higher concentration in blood across walls of alveolar capillaries to lower concentration in air in alveoli.Blood coming into pulmonary capillaries is oxygen poor and alveolar air is oxygen rich.Oxygen diffuses from higher concentration in alveoli across walls of alveolar capillaries to lower concentration in blood.▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
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Related Questions
a wildtype allele and a mutant allele differ by a few nucleotides in the gene sequence for an important protein in neuron metabolism. in an individual who is a heterozygote, both the mutant and the wildtype proteins are synthesized in neurons. at the organismal level, the mutant allele is:
Answers
Wild type and mutant are recessive alleles. The allele that is not expressed when there is heterozygosity. untamed type a person with a typical phenotype.
the trait that is typically present in an organism's natural population. mutant a person who deviates from the typical phenotype in some way. The terms "wild type" and "mutant" refer to people with normal phenotypes shared by the bulk of the natural population, while "mutant" refers to those whose phenotypes deviate from those of the normal population. Melanocytes, a kind of cell, are responsible for producing the protein melanin. Melanin has a crucial role in shielding the skin from the sun's UV rays, which may damage DNA and lead to skin cancer. Albinism is brought on by both alleles of the gene being autosomal recessive. Recessive mutant alleles are those that result in proteins with diminished or nonexistent function.
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Both mutant and wild-type alleles are recessive. the allele that is silenced in a heterozygote situation. a person with a characteristic phenotype is the untamed type.
A characteristic that is frequently seen in an organism's natural population. a mutant is a person whose phenotype differs in some manner from the norm. "Wild type" and "mutant" refer to individuals whose phenotypes are similar to those of the majority of the natural population.
"Mutant" describes individuals whose phenotypes differ from those of the normal population. The cell type called melanocytes is in charge of making the melanin protein. Melanin is essential for protecting the skin from UV radiation, which can harm DNA and cause skin cancer.
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What’s the correct answer , I’m not sure
Answers
Answer:
b i beleive
Explanation:
How do scientists figure out the age of a substance using radiometric dating?
Answers
Answer:
It's based on the natural radioactive decay of certain elements, such as potassium and carbon.
Explanation:
Answer:
To establish the age of a rock or a fossil, researchers or scientists use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.
Explanation:
2. Which of these could be caused by a single-celled organism?
A. John left a bicycle out in the rain, and it began to rust,
B Joe mixed baking soda and vinegar, and it started to bubble,
O C Mikayla left the milk out overnight, and it smelled sour the next day.
D Jenny put sugar into some iced tea and stirred it until she could not see the sugar
anymore
Answers
Answer:
The correct answer is C!
Explanation:
Single-celled organism are usually bacteria like Fungai. When Mikayla left the milk out a single-celled organism formed turning it bad!
Mikayla left the milk out overnight, and it smelled sour the next day so, souring of milk can be caused by single-celled organism.
What is single-celled organism?A single-celled organism, also known as a unicellular organism, is an organism made up of only one cell, such as bacteria, protists, and yeast.
What is souring of milk?When the bacterium is given an ambient temperature (by maintaining the milk at room temperature), the bacteria feeds on the sugar in the milk. As a result, milk turns sour. This process of milk sourness is a fermentation process that transforms lactose in milk to lactic acid, making milk acidic (lower pH value).Souring of milk is most commonly caused by the inoculation of Lactic acid bacteria, a single-celled organism.Hence, the correct option is C.
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Lab #
For Each graph below:
a) LABEL each axis.
b) PLOT your points and CIRCLE/SQUARE each enzyme as directed. Give each a specific COLOR
c) LABEL each enzyme on the graph for clarity.
0°℃
10°C
20°C
30°C
40°C
Circle Plots
Effect of Temperature on Enzyme A Action
Temperature
Rate of Reaction
30°C
40°C
50°C
60°C
70°C
Graphing The Effect of Variables on Enzyme Action
0 mg/s
6 mg/s
10 mg/s
12 mg/s
0 mg/s
Square Plots
Effect of Temperature on Enzyme B Action
Temperature
Rate of Reaction
0 mg/s
4 mg/s
13 mg/s
14 mg/s
0 mg/s
Rate of reaction
a. What is the optimum temperature that enzyme A functions best?
b. What happens to the enzyme activity of A after 30 degrees?
Effect of Temperature on Enzyme Action
c. What is the optimum temperature that enzyme B functions best?
d. What happens to the enzyme activity of B before it reaches 60 degrees?
e. At which temperature do both enzyme A and B both function?
f. Which temperatures do neither enzyme A or B function under?
Comperature (℃)
Answers
The optimum temperature at which enzyme A functions best is 30 °C
The enzyme activity of A decreases after 30 degrees.
The optimum temperature that enzyme B functions best is 60 °C
The enzyme activity of B increases before it reaches 60 degrees.
The temperature at which both enzyme A and B function is 35 °C
The temperatures at which neither enzyme A or B functions are 0 °C and 40 °C.
What are enzymes?Enzymes are biological catalysts that speed up the rate of chemical reactions but remain unchanged chemically at the end of the reactions. enzymes are usually proteins and are therefore sensitive to temperature changes.
The molecules that enzymes may work upon are known as substrates, and the enzyme changes the substrates into new molecules known as product.
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what is meant by a mutualistic type of symbiotic relationship
Answers
The mutualistic type of symbiotic relationship is when two organisms benefit from one another. Details about mutualistic relationship is found below.
What is mutualism?Mutualism is any interaction between two species that benefits both species of organisms.
Mutualistic relationship typically involves the exchange of substances or services between the involved parties.
For example, the relationship where the egret feeds on the cattle to get rid of parasites is a mutualistic relationship.
Therefore, the mutualistic type of symbiotic relationship is when two organisms benefit from one another.
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The simple meaning of mutualistic type of a symbiotic relationship is that both organisms benefits from each other
What is symbiosis?Symbiosis can be defined as a special type of biological association which exist between two different organisms in which the two benefits from each other
In symbiosis, each organism is called a symbiont.
So therefore, te simple meaning of mutualistic type of a symbiotic relationship is that both organisms benefits from each other
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A student examined two slides in the laboratory, one slide with normally dividing cells and another slide with cancerous cells. Which statement best predicts what the student will observe on the slide with cancer cells compared to the slide with normally dividing cells?
aThe slide with cancer cells will show more cells in interphase because they are growing in preparation for cell division.
b.The slide with cancer cells will show more cells in interphase because the stages of mitosis take longer to complete.
c.The slide with cancer cells will show fewer cells in interphase because the cells are dividing rapidly.
d.The slide with cancer cells will show fewer cells in interphase because the cells are not dividing.
Answers
The answer is option a, The slide with cancer cells will show more cells in interphase because they are growing in preparation for cell division. The correct answer is A.
The slide with cancer cells will show more cells in interphase because they are growing in preparation for cell division. There are some differences between cancer cells and normal cells.
Normally dividing cells go through the cell cycle: G1, S, G2, and M. During G1, cells grow and develop, but they don't begin DNA synthesis. DNA synthesis occurs during S phase, which is followed by G2, where the cell checks and prepares its newly synthesized DNA for mitosis.
Finally, mitosis, which is a sequence of steps during which a cell divides into two identical cells. Cancer cells, on the other hand, do not enter into the G0 phase; instead, they continue to divide.
As a result, they divide more quickly and require more nutrients. Since more cells need to be produced, more cells will be in interphase, growing and developing in preparation for cell division. Therefore, the correct answer is A.
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How does deforestation affect the water cycle:
A. It increases the amount of percolation
B. It increases the amount of runoff
C. It increases the amount of transpiration
D. It increases the amount of precipitation
Answers
Answer:
B. It increases the amount of runoff
NEED HELPP ASAP PLEASEE!! :)
7. Why is it impossible for a paper clip to contain the enzyme catalase?
Answers
Answer:
Because they have to use for the rate of the reaction rate of the chemical reaction like other temperature affect the reaction of the engine catalysis.
Answer:
Hydrogen peroxide separate to catalase to prevent reaction from starting before the desired temperature
Explanation:
What are some factors that could affect a forensic entomologist's estimate of PMI?
Answers
Answer:
Temperature , Insects and Time
Explanation:
Including some of the most common variables influencing post-mortem period predictions are thoroughly investigated, like temperature, grave size, and parasite exposure to the bone. Diptera are also the insects of highest forensic concern because of their behavior and massive worldwide spread.
Even-aged management practices involves clearing trees that
are all the same height
b. are all the same weight
C. are all near the same age
d. are all of widely different ages
Please select the best answer from the choices provided
Answers
Answer: C. Are all near same age.
Explanation: Even-aged firewood management practices refer to the practice of clearing of trees that "are all near the same age"as this technique is usually adopted to maintain the proportion and continuity of various species of trees(thus, cutting of the trees of same age). This practice is employed to minimize the costs and attain a coeval and comrade group of trees. It proves quite beneficial in reestablishing the succession of a native breed. It involves the selection of trees at first depending on the size, desirable species, etc. followed by clearcutting of unmerchantable(undesired) trees. This technique is usually adopted to maintain the proportion and continuity of various species of trees.
KEYWORD- “Even- aged”which means clearing all trees that are even to all near the same age of tree.
Complete these sentences using the terms anterior and posterior.
6 The heel is
to the toes.
7 The biceps are
to the triceps.
8 The hamstring is
to the quadriceps.
Answers
Biceps are Anterior to the triceps.
Hamstring is Posterior to quad.
Elena is not able to feel the stimulation Natalia checked for. The _____ part of the spinal cord passes sensory information.(it is not the posterior root)
Answers
The part of the spinal cord that passes sensory information, besides the posterior root, is the dorsal column.
The spinal cord has various pathways for transmitting sensory information. Although the posterior root is the most common structure associated with sensory information transmission, the dorsal column is another important part of the spinal cord that plays a role in passing sensory information. It is responsible for transmitting touch, pressure, and vibration sensations from the body to the brain.
If Elena is unable to feel the stimulation Natalia checked for, it may be related to the dorsal column of her spinal cord, which is responsible for passing specific types of sensory information.
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What is the main transformation that occurs during glycolysis?
Answers
Answer:
Glycolysis produces pyruvate and ATP
Explanation:
Answer:
Glycolysis produces ATP by oxidizing water
Explanation:
Glycolysis produces ATP and pyruvate by oxidizing glucose and NAD+. Glycolysis produces pyruvate, ATP, and NADH by oxidizing glucose. Glycolysis produces CO2, ATP, and pyruvate by reducing glucose.
What is the function of the ribosome in the cell?
O Produces glucose
O Breaks down cellular waste
OSynthesizes proteins
O Stores food, water, and wastes
Answers
Answer:
the answer is D, Synthesises Protiens
Answer:
Synthesizes proteins
Explanation:
Ribosome, particle that is present in large numbers in all living cells and serves as the site of protein synthesis. Ribosomes occur both as free particles in prokaryotic and eukaryotic cells and as particles attached to the membranes of the endoplasmic reticulum in eukaryotic cells.
What is the role of a species can assume in ecosystem this ecncompasses all the way in which species interacts with the ecosystem, such as what it eats
Answers
The role a species can assume in ecosystem that encompasses all the way in which species interacts with the ecosystem, such as what it eats is called niche.
What is a niche?Niche is a function within an ecological system to which an organism is especially suited.
The niche of an organism describes the role the organism plays in a community or ecosystem.
A species' niche encompasses both the physical and environmental conditions it requires like temperature and the interactions it has with other species (like predation or competition).
Niche is specific to a particular species, which may overlap with a similar niche but must have distinct differences.
Therefore, it can be said that a niche is the role of a species in an ecosystem.
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Help Match The Following Terms!
Answers
Answer: could only find first part sorry
part 1:
1. F
2. i
3. C
4. E
5. A
6.h
7. d
8. B
9. L
10 m
11. K
12.n
13 G
14 j
Explanation:
I need help on 2, 3, and 4.
Answers
3.) Pebbles
4.) 10 cm/s
Which example best describes a reflex action?
A.
coughing when the throat is irritated
B.
eating food when hungry
C.
going for a walk outside
D.
bending down to lift a heavy object
Answers
Because each cough occurs through the stimulation of a complex reflex arc.
1.What is the difference between renewable and nonrenewable resources?
2.What are some reasons a resource might be described as a potentially renewable resource?
3.Why are marine scientists important to companies that extract resources from the ocean?
Answers
Answer:
1.The difference between these two types of resources is that renewable resources can naturally replenish themselves while nonrenewable resources cannot. This means that nonrenewable resources are limited in supply and cannot be used sustainably.
2. Potentially renewable resources include wood and biofuel. Nondepletable resources include wind, solar, hydroelectric, and geothermal energy.
3. They often serve important ecological functions, provide coastal protection, and are critical resources for food, energy, tourism and economic development. In many parts of the world, such marine and coastal systems are under stress or are threatened from a variety of sources, both human and natural.
Describe the action of CILIA in the movement of mucus. ANSWER ASAP PLS!!!
Answers
Answer:
Motile' (or moving) cilia are found in the lungs, respiratory tract and middle ear. These cilia have a rhythmic waving or beating motion. They work, for instance, to keep the airways clear of mucus and dirt, allowing us to breathe easily and without irritation. They also help propel sperm.
.
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Which component of the limbic system has an essential role in the formation of new memories?
Answers
The amygdala doesn't just modify the strength and emotional content of memories; it also plays a key role in forming new memories specifically related to fear.
What is Limbic system ?The limbic system is the area of the brain that controls our behaviour and emotions, especially when it comes to actions we must take to survive, such as eating, reproducing, and caring for our young, as well as reactions like "fight or flight."
The hypothalamus, the amygdala, the thalamus, and the hippocampus are the four major components of the limbic system.Aphasia is a disorder that affects some persons who have suffered limbic lobe injury and makes it difficult for them to talk, understand language, or both. mood, attitude, or impulse control changes. interruptions to working or autobiographical memory that could alter personality or behaviour.Learn more about Limbic system here:
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Where can you find most of Earths’s frozen freshwater? I will mark brainiest plz give rig by answer
Answers
Answer:
C. In mountain glaciers
Explanation:
That is all frozen freshwater.
Answer:
In the Southern polar ice cap
Explanation:
1.
Choose which of Newton’s laws of motion is occurring in the boundary type’s situation.
Two plates that slide past each other build up stress that is released as an earthquake.
1st Law of Motion
2nd Law of Motion
3rd Law of Motion
Answers
Answer:
3rd Law of Motion
Explanation:
Answer: newton’s 1st law of motion
Explanation: Inertia states that an object that is at rest will stay at rest and an object that is in motion will stay in motion unless acted on by an unbalanced force.
Which of the following consists of an amino group, a carboxyl group, and a
side chain?
A. DNA
B. An amino acid
C. A nucleotide
D. A carbohydrate
Answers
Answer:
An amino acid
Explanation:
You are the head of an international granting agency that assist farmers with soil conservation and sustainable agriculture. You have $10 million to disburse. Your agencies staff has decided that the finding should go to farmers in an arid area of Africa prone to salinization What type of projects would you recommend funding in each of these areas, how would you apportion your funding among them, and why?
Answers
The projects that will receive funding in arid areas of Africa prone to salinization include:
Reforestation and irrigation projects -will receive about 50% of the funds.Cover-crop and salt-tolerant crop farming will receive about 30% of the funds.Desalinization projects will receive about 0% of the funding.What is salinization?Salinization is the process whereby the mineral salt content of the soil in an area increases as a result of adverse environmental conditions such as drought.
The projects that will receive funding in arid areas of Africa prone to salinization include:
Reforestation and irrigation projects - these will receive about 50% of the funds as reforestation and irrigation helps reduce soil salinity.Cover-crop and salt-tolerant crop farming will receive about 30 % of the funds as these crops help reduce soil salinityDesalinization projects will receive about 30% of the funding.In conclusion, salinization of soil poses a big threat to crop production in arid regions of Africa.
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Having learned the optimum sugar concentration, the students next decide to investigate whether different strains of yeast ferment glucose to produce different amounts of alcohol. briefly explain how this experiment would be set up.
Answers
The experiment can be set by providing each strain of yeast the optimum amount of glucose solution and then the amount of alcohol produced by fermentation is measured.
Yeast is s single-celled eukaryotic organism. It belongs to the kingdom Fungi. It is highly used in daily cooking, baking and the alcohol industry. The organism requires sugar, starch and moisture to grow in a place.
Fermentation is the process of breakdown of sugar to release alcohol or lactic acid and carbon dioxide in the process. It is by this process that the many food items become puffy after kept for sometime. Yeast is the most common organism involved in the process of fermentation.
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my people trace their origins to a few hundred thousand years ago on the eurasian continent. we were still there to witness the arrival of our sister species, homo sapiens, when some of you came to eurasia from africa maybe 60,000 years ago. (we were shorter but stronger than modern humans, and our cranial capacity was, on average, slightly larger than yours.)
Answers
The statement suggests that the speaker's people have ancestral roots dating back a few hundred thousand years on the Eurasian continent. They claim to have witnessed the arrival of Homo sapiens, who migrated from Africa approximately 60,000 years ago. The speaker describes their people as shorter but stronger than modern humans, with slightly larger cranial capacity on average.
The statement highlights the existence of a population that traces its origins back to the Eurasian continent hundreds of thousands of years ago. These people claim to have witnessed the migration of Homo sapiens from Africa around 60,000 years ago. It suggests the coexistence of different human species during that time period, with the speaker's people being described as having distinct physical characteristics such as shorter stature, greater strength, and slightly larger cranial capacity compared to modern humans.
This description aligns with the understanding that various hominin species, including Neanderthals and Denisovans, inhabited different regions of the world prior to the arrival of Homo sapiens. These species shared common ancestors and evolved separately in different parts of the world. The speaker's people may represent one of these sister species, distinct from Homo sapiens but sharing a common ancestry.
It is important to note that the information provided is based on the statement given and does not reflect a comprehensive analysis of archaeological or genetic evidence. Further research and exploration of human evolutionary history are necessary to gain a more complete understanding of the relationships between different hominin species and their interactions over time.
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Please Help Quick ASAP Hurry
A species of squirrels were split in half when a tornado swept through the forest.
Half of the squirrels ended up in an environment near a pond. The other half ended up on rocky ground. They were too far apart to reunite. Ten years later, both of the squirrel populations' allele frequencies had changed to be more fit for their environments. The pond squirrel population and the rocky ground squirrel populations could no longer mate together.
What was the cause of this speciation?
A. geographic isolation
B. gene flow
C. a decrease in the mutation rate
D. a change in climate
Answers
Geographic isolation was the cause of this speciation (Option A). It led to reproductive isolation.
What is speciation?Speciation refers to the separation of one species into two or more species due to the emergence of divergence.
The reduction in gene flow due to geographic isolation leads to the emergence of reproductive barriers.
In consequence, these reproductive barriers can be understood as a consequence of geographic isolation.
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How would you study ecological succession in different ecosystems?
Answers
Answer:
Ecological succession in different ecosystems can be studied by first of all recognizing the various ecosystems and what makes them unique. Thereafter, sample collection methods and regimen must be established with standardized experiments for establishing diversity of organisms in the ecosystem. Regular data storage and interpretation is needed to know what goes on in the ecosystem and at what time.
Explanation:
To study ecological succession in a fermented food sample, for example, palm-wine, methods such as metagenomics can be used to determine the diversity of organisms at various points from the tapping stage through various hours of alcoholic fermentation. This will reveal the initial colonizers of the sample and what happens to them as the pH of the palm-wine changes. Eventually, only organisms that can tolerate high acidity will thrive as the fermentation proceeds.