the eye has several structures to facilitate sight. which structure serves as the mucous membrane lining of the eyelids?
Answers
The mucous membrane that lines the eyelids is the conjunctiva.
The eye is a sensory organ that functions to provide vision. Based on the anatomical structure, the eye is divided into 3 layers, which consist of the outer layer of the cornea and sclera, the uvea in the middle, and the retina in the deepest layer. When looking at an object, the extraocular muscles voluntarily move the eyeball to find the object.
The conjunctiva itself is a part of the eye in the form of a thin layer which functions to protect the eyeball and contains blood vessels to provide nutrition to the membrane. The conjunctiva protects the eye by producing mucus and tears which will block bacteria or foreign objects from entering the eye. The conjunctiva also causes the eyelids to move easily.
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Related Questions
The mineral substances that are normally found in the blood, such as sodium and potassium, are known as ____________________.
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The mineral substances that are normally found in the blood, such as sodium and potassium, are known as Electrolytes.
Who are electrolytes?Electrolytes are minerals that carry an electrical charge when they are dissolved in a liquid such as blood. Blood electrolytes – sodium, potassium, chloride and bicarbonate – help regulate nerve and muscle function and maintain an acid-base balance.
Major Electrolytes are Sodium, potassium, calcium, phosphate and magnesium are the electrolytes involved in salt balance disorders. In addition, the concentration of chloride and bicarbonate is commonly measured.
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All the biological macromolecules contain carbon, hydrogen and oxygen. However, most do not contain nitrogen. The category that
contains nitrogen are
A) Lipids
B) Proteins
C) carbohydrates
D) unsaturated fats
Answers
Answer:
A. lipids
Explanation:
Why are antibiotics not effective against viruses? (think back to what you learned about viruses in pbs.)
Answers
Antibiotics are not effective against viruses because they are designed to kill bacteria by targeting their unique structures and processes.
Viruses have different structures and rely on host cells for replication, making antibiotics ineffective against them.
Antibiotics are not effective against viruses because they work by targeting and killing bacteria, not viruses. Antibiotics are designed to attack the specific structures and processes that are unique to bacteria, such as their cell walls or protein synthesis machinery. Viruses, on the other hand, are different from bacteria. They are much smaller and do not have the same structures or processes as bacteria.
Viruses are composed of genetic material, either DNA or RNA, surrounded by a protein coat. They cannot carry out metabolic activities on their own and rely on host cells to reproduce. When a virus infects a host cell, it hijacks the cell's machinery to replicate itself. Antibiotics cannot disrupt this process because they do not target the specific structures or processes that viruses rely on for replication.
Antibiotics are not effective against viruses because they are designed to kill bacteria by targeting their unique structures and processes. Viruses have different structures and rely on host cells for replication, making antibiotics ineffective against them. It is important to understand the difference between bacteria and viruses in order to understand why antibiotics cannot treat viral infections.
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In green plants, what is the sequence of photosystems, and what does each photosystem produce?.
Answers
In green plants arrangement of photosystems:
Photosystem II→ ATP production→ Photosystem I→ NADPH production.
What are photosystems?Although PSII arrives first in the electron flow route, it is given the second designation since PSI was found first.
Chloroplasts either export this three-carbon sugar phosphate or transform it internally into starch. Carboxylation, reduction, isomerization, condensation, dismutation, and phosphorylation are the cycle's four steps, respectively.
Therefore photosystem is arranged from Photosystem II to NADPH production.
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Wich action would most likely increase the amount of carbon in the environment
Answers
Answer:
Cutting down trees
Explanation:
Of course this is just my opinion, but stopping the production of oxygen can greatly effect the carbon and oxygen ratio thus, increasing the level of carbon in the air. There are many different ways for the increase of carbon to take place but I think that cutting down trees has a major effect.
the m checkpoint is an example of a checkpoint that is internally controlled by the cell. what would be the potential consequence seen in daughter cells if the cell received a stop signal at this checkpoint but was able to continue to anaphase anyway? the m checkpoint is an example of a checkpoint that is internally controlled by the cell. what would be the potential consequence seen in daughter cells if the cell received a stop signal at this checkpoint but was able to continue to anaphase anyway? at the completion of mitosis and cytokinesis, the daughter cells would automatically enter the g0 phase. at the completion of mitosis and cytokinesis, each daughter cell would have twice as much dna because the sister chromatids would not have separated properly. the cells would pause at the end of anaphase and not finish mitosis or cytokinesis. at the completion of mitosis and cytokinesis, the daughter cells could have missing or extra chromosomes.
Answers
The M checkpoint, also known as the spindle assembly checkpoint, ensures that all chromosomes are properly attached to the spindle fibers before a cell proceeds from metaphase to anaphase during mitosis.
If a cell receives a stop signal at this checkpoint but continues to anaphase anyway, the potential consequence seen in daughter cells would be the presence of missing or extra chromosomes.
This occurs because the improper separation of sister chromatids can lead to unequal distribution of chromosomes among the two daughter cells. As a result, one cell may have more chromosomes, while the other may have fewer than the normal amount. This abnormality can cause various issues in the daughter cells, such as genetic disorders or malfunctioning cells.
In summary, the M checkpoint plays a crucial role in ensuring the correct distribution of chromosomes to daughter cells during mitosis. Bypassing this checkpoint can lead to daughter cells with missing or extra chromosomes, which can have detrimental effects on the cells' function and the overall health of the organism.
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The best graph to use when showing “continuous” data is?
Answers
Answer:
Histogram
Explanation:
They show the distribution of the values.
The lysogenic cycle is different from the lyric cycle because in the
Answers
The main difference between the lysogenic and lytic cycles is that the lysogenic cycle involves integration of viral DNA into the host cell's genome, while the lytic cycle involves rapid virus replication and destruction of the host cell.
The lysogenic cycle and the lytic cycle are two different ways in which viruses can replicate and infect host cells. In the lytic cycle, the virus enters the host cell, takes over the cell's machinery, and uses it to produce new viral particles. These particles then burst out of the host cell, killing it in the process. This cycle typically results in rapid virus replication and the destruction of the host cell. In contrast, the lysogenic cycle is a more dormant phase in which the virus integrates its DNA into the host cell's DNA, becoming a part of the host's genome. The integrated viral DNA is known as a prophage.
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What is one drawback of using evidence found in rock layers to determine a relative history of the earth?
1. not all organisms leave fossils
2. not all layers contain salt deposits
3. all areas of earth have distinct rock layers
4. rock layers are never disturbed
Answers
3) In tigers, orange fur is dominant over white fur. A white cub has orange-furred parents. What is the genotype of each parent?
Answers
Answer:
heterozygous. I believe
Explanation:
A eukaryotic chromosome is made of two _____ which are held together by a ______.
A.) Centromeres - Histone
B.) Chromatids - Centromere
C.) Chromatins - Nucleosome
Choose A, B or C
Answers
¿Qué tipo de proceso metabólico se realiza cuando los lípidos y los fosfolípidos y triglicéridos se forman a ser moléculas sencillas dentro de la célula?
Answers
Answer:
catabólico
Explanation:
Los procesos metabólicos pueden ser:
Anabólicos: donde se forman moléculas más complejas a partir de moléculas simples. Esta formación de moléculas o estructuras más complejas consume energía. Catabólicos: donde se degradan o descomponen moléculas grandes o más complejas en otras más simples. Este proceso libera energía, que es utilizada en otros procesos y reacciones.En base a esto, la formación de moléculas sencillas a partir de moléculas grandes como los lípidos, fosfolípidos y triglicéridos es es proceso catabólico. En esta descomposición se produce energía para ser usada en otras reacciones.
The zebra mussel is an invasive species. Which statement is most likely true if the zebra mussel is introduced to a new environment without predators?
A. Zebra mussels will disrupt the community and cause native species to decline as they eat all the food.
B. Zebra mussels will not cause a significant change in the community.
C. Zebra mussels will become part of the climax community.
D. Zebra mussels will become the keystone species.
Answers
Answer:
A.
Explanation:
when given that a species is invasive you can read through the answers and determine which description sounds invasive
HIF1α is a key player in angiogenesis. VHL is a protein required for the degradation of HIF1α in the normal oxygen level. Loss-of-function mutations in the VHL gene have been found to promote tumor growth. Please explain why these mutations can promote tumor growth?
Answers
Answer:
Explanation:
The VHL gene is a tumour suppressor gene that regulates cell growth and cell death. This gene is also located on chromosome 3. It functions to prevent rapid proliferation of cells. For a person to develop tumor both copies of the gene must be mistake or altered allowing for a loss of function that prevents its from causing degradation of HIF1α in the normal oxygen level as its it normal function. This then allows for the survival of HIF1α that promotes amgiogenesis promoting tumor development.
In the experiment by yoshida and kinosita, fluorescently labeled actin was attached to atp synthase. No atp was added to one preparation, which showed no change over the course of the experiment. Atp was added to a second preparation and the movement of the actin was recorded. Explain what can be concluded from this experiment.
Answers
The conclusion that can be derived from this experiment is that ATP synthase binds to ATP and rotates.
ATP Definition Adenosine triphosphate (ATP) is created during the cellular respiration process by the enzyme ATP synthase. ATP is the major source of energy for cells.
The enzyme responsible for ATP production is a catalysis enzyme that generates ATP from inorganic phosphate and ADP. Angiostatin attaches to the large protein enzyme called as ATP synthase, which creates energy for the cell.
Because ATP synthesis is linked to the movement of three protons from the lumen to the stroma via the ATP synthase, ATP creation is thermodynamically conceivable when the ΔμH+ from across thylakoid is more than 3 times the G of ATP formation.
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According to Chargaff's Rule, DNA genomes exhibit
1. A = T
2. A + G = C + T
3. A + T = G + C
4. G = C
a.1, 3, 4
b.2, 3
c.1, 2, 4
d.1, 2
Answers
The correct Option is (a) 1, 3, and 4, which indicates that A always pairs with T, and G always pairs with C, and the amount of A is equal to T, and the amount of G is equal to C.
According to Chargaff's Rule, DNA genomes exhibit a base pairing rule where adenine (A) always pairs with thymine (T) and guanine (G) always pairs with cytosine (C). This rule further shows that the amount of A in a DNA strand is equal to the amount of T, and the amount of G is equal to the amount of C.
The correct answer to this question is (a) 1, 3, and 4. Chargaff's Rule helps in understanding the base composition of DNA. It states that A always pairs with T and G always pairs with C. Hence, the amount of A in a DNA strand will always be equal to the amount of T and the amount of G will always be equal to the amount of C. This rule is important in DNA research as it helps in understanding the structure and function of DNA.
Chargaff's Rule is an important rule in DNA research as it helps in understanding the base composition of DNA. The correct answer to the question is (a) 1, 3, and 4, which indicates that A always pairs with T, and G always pairs with C, and the amount of A is equal to T, and the amount of G is equal to C.
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The plateau phase of the ventricular muscle action potential? Select one: a. Is caused because the Na+ channels remain open b. Prevents tetanus from occurring
c. Is a result of Ca2+ binding to the ryanodine receptor d. Occurs because Cl- channels open wide
Answers
The plateau phase of the ventricular muscle action potential is a critical component in the cardiac cycle, as it plays a vital role in regulating the heart's function. The correct option is b. Prevents tetanus from occurring.
The plateau phase is characterized by a sustained period of membrane depolarization, primarily due to the opening of voltage-gated L-type calcium channels (Ca²⁺ channels) and the simultaneous inactivation of some potassium (K+) channels. This results in a balanced influx of Ca²⁺ and efflux of K+, maintaining the membrane potential near its peak for an extended duration. Importantly, this prolonged depolarization prevents the ventricular muscle from undergoing rapid, repeated contractions, which could lead to a life-threatening condition called tetanus.
Preventing tetanus is essential for proper cardiac function, as it ensures that the heart has enough time to fill with blood between contractions and efficiently pump blood to the rest of the body. The plateau phase allows the ventricular muscle to undergo a refractory period, preventing it from contracting again until repolarization is complete.
In summary, the plateau phase of the ventricular muscle action potential is essential in maintaining proper cardiac function by preventing tetanus from occurring. This phase is achieved by balancing the influx of calcium ions and efflux of potassium ions, resulting in a sustained period of membrane depolarization and ensuring an adequate refractory period for the heart muscle.
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The (4) ____ is built around the nose,lungs,and breathing tubes.
Answers
The ciliated epithelial cell is built around the nose, lungs, and breathing tubes.
What is a respiratory system?A respiratory system is defined as one of the major systems of the body that is made up of organs that helps in the removal of carbondioxide and in take of oxygen for the use of body cells.
The organs of the respiratory system include the following:
NoseLungs Breathing tubes(trachea)The ciliated epithelial cells is a natural in-built defensive mechanism that helps in the removal of dirts that are trapped during breathing.
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Match the sentences in the following chart
A- Recombinant bacterial plasmid is used to produce genetically modified plants.
B- Recombinant bacterial plasmid is used to produce human insulin.
C- Recombinant viral DNA is used to treat some diseases like cystic fibrosis.
D- Random DNA sequences that are different from
one person to another.
1-DNA fingerprint
2-GMO
3-Human proteins production
4-Gene therapy
Answers
Matching the sentences in the chart:
A - 2-GMO (Recombinant bacterial plasmid is used to produce genetically modified plants)
B - 3-Human proteins production (Recombinant bacterial plasmid is used to produce human insulin)
C - 4-Gene therapy (Recombinant viral DNA is used to treat some diseases like cystic fibrosis)
D - 1-DNA fingerprint (Random DNA sequences that are different from one person to another)
•.. Your ASSIGNMENT
Birds cause a lot of damage to airplanes every year. To study this problem, the U.S.
Air Force invented a chicken cannon. Air Force scientists use the cannon to shoot
chicken bodies at airplanes in controlled tests. Then they analyze the damage the
chicken bodies caused.
Evaluate this model. In what way do you think it is helpful? What are some of its
limitations?
Answers
The chicken gun is a large-diameter, compressed air gun used to firebird at aircraft components in order to stimulate high-speed bird strikes.
What is the work of chicken canon?It is a flight impact stimulator that has been used to test glass canopies and is used to kill birds which causes the most dangerous threat to the military.
The chicken gun had a cubic-foot chamber at one end that is filled with pressurized air. It was loaded into a wooden sabot, and then loaded into the barrel. Diaphragm separates the barrel from air chamber. At the time of launch the diaphragm was ruptured, letting air enter the barrel and push the sabot down.
Limitations of introducing chicken canon include:
Availability of airplanes that are not in use. Risk of wet litterRisk of dirty feathersDanger of mould and other contaminationThis is a controlled model in which no birds and commercial airplanes.
Most accidents occur when a bird collides with the wind screen into the engine of the jet aircraft. A bird injected by a jet engine can break the engine's compressor blades, potentially causing catastrotrophic damage.
Hence chicken canon was invented to control damage caused by chicken bodies at airplanes.
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which statement correctly distinguishes DNA and RNA?
Answers
Why do you need a messenger like mRNA to get a protein made from a DNA “recipe”?
Answers
Answer:
long story short, RNA is necessary for your body to make the proteins that give you structure, let you move (muscles), send signals (hormones), have chemical reactions (enzymes), fight infections (antibodies) and lots of other things that make life possible.
Which is a disadvantage of inbreeding?
pls an answer asap!!
bio
Answers
the answer is second one
29. Mobility contributes to positive outcomes throughout the body. What is a positive effect of mobility on the respiratory system
Answers
Regular mobility and physical activity can improve lung capacity and function, allowing for increased oxygen intake and carbon dioxide removal, leading to improved respiratory health and decreased risk of respiratory diseases.
Mobility plays an essential role in promoting a healthy respiratory system. Physical activity and mobility can enhance lung capacity and oxygen uptake, which are critical factors in maintaining healthy lungs.
Regular physical activity can also help to reduce the risk of respiratory infections and other respiratory-related illnesses.
One of the significant benefits of mobility on the respiratory system is the improvement in lung function.
Exercise and physical activity can help to strengthen the respiratory muscles, which in turn can improve lung capacity and efficiency.
Additionally, physical activity can help to reduce inflammation in the lungs, which is a contributing factor to respiratory diseases such as asthma and chronic obstructive pulmonary disease (COPD).
Another positive effect of mobility on the respiratory system is the increase in oxygen uptake.
When we exercise, we breathe in more oxygen, which is then transported throughout the body to fuel our muscles and other organs.
This increased oxygen uptake can improve the overall health and function of the respiratory system.
In conclusion, mobility and physical activity are essential in promoting a healthy respiratory system. Improved lung function and oxygen uptake are just a few of the many benefits that can be achieved through regular exercise and mobility.
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That faces are somewhat special visual stimuli is supported by all these findings except that:
Select one:
a. babies prefer stimuli with vertical (left/right) symmetry over those with horizontal (up/down) symmetry.
b. babies only a few days old prefer to look at the faces of their own mother over other age-matched female faces.
c. we are better at recognizing previously seen faces than other types of visual stimuli.
d. even very impoverished line drawings can be interpreted as faces.
e. babies prefer to look at faces over other stimuli
Answers
The faces are some what special visual stimuli that are supported by most of the findings except that babies prefer stimuli with vertical (left/right) symmetry over those with horizontal (up/down) symmetry. The remaining options (b, c, d, e) are consistent with the concept that faces are unique visual stimuli.
Babies only a few days old prefer to look at the faces of their mother over other age-matched female faces. It suggests that infants have an innate preference for the unique features of human faces, which distinguishes them from other objects and faces.
Therefore, all of the options given (except option a) support the idea that faces are unique visual stimuli that are processed using a distinct neural mechanism. These findings suggest that humans have an innate preference for faces and that our ability to recognize and remember them is better than for other types of visual stimuli.
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Which of the following best explains how human activities can directly contribute to landslides? a. removing plants from hillsides eliminates the root structures that anchor soil. b. clearing trees from hills increases the frequency of rainstorms. c. human activities tend to reduce the risk of fires. d. landslides are not impacted by human activities. please select the best answer from the choices provided a b c d
Answers
Human activities that contribute to landslides are removing plants from hillsides eliminates the root structures that anchor soil.
How do trees prevent landslides?Tree roots support soil layers, anchor the soil to bedrock and form buttresses against soil motion. Trees also reduce landslide risk by lowering soil moisture levels, interception, evaporation and transpiration are the primary means.
Thus, removing plants from hillsides eliminates the root structures that anchor soil contributes to landslides.
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Answer:
A
Explanation:
Ed
Which of the following will conjugation occur in?
animals
flowers
protozoa
trees?
Answers
Answer:
protozoa
Explanation:
Answer:
Protozoa
Explanation:
Just give the other dude brainlist bc he got here first. <3
What are things that sound waves can travel through?
Answers
Answer:
Sound waves are longitudinal waves. They need a medium to travel through. They cause particles of the medium to vibrate parallel to the direction of wave travel. The vibrations can travel through Solids, Liquids or Gases.
Explanation:
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what general class of enzymes does tyrosinase belong to? question 4 options: transferase isomerase ligase hydrolase oxidoreductase lyase
Answers
Tyrosinase belongs to the general class of enzymes called oxidoreductases. The correct option is e.
These enzymes are responsible for catalyzing oxidation-reduction reactions, which involve the transfer of electrons between molecules. In these reactions, one molecule is oxidized (loses electrons), while the other is reduced (gains electrons).
Tyrosinase is a copper-containing enzyme that plays a crucial role in the biosynthesis of melanin, a pigment found in various organisms. It catalyzes the oxidation of tyrosine, an amino acid, to dopaquinone, which then undergoes further transformations to form melanin.
Here's a brief overview of the other classes of enzymes mentioned:
1. Transferases: These enzymes catalyze the transfer of a functional group, such as a phosphate or methyl group, from one molecule to another.
2. Isomerases: They facilitate the conversion of a molecule into its isomeric form, i.e., they rearrange the molecular structure without changing the molecular formula.
3. Ligases: Also known as synthetases, ligases catalyze the bonding of two molecules with the help of energy derived from the hydrolysis of a nucleoside triphosphate (e.g., ATP).
4. Hydrolases: They catalyze the cleavage of a bond through the addition of water (hydrolysis).
5. Lyases: These enzymes promote the breaking or formation of chemical bonds in a substrate without the involvement of water or the transfer of electrons.
In summary, tyrosinase belongs to the oxidoreductase class of enzymes, which are involved in oxidation-reduction reactions. This enzyme plays a key role in the synthesis of melanin by catalyzing the oxidation of tyrosine to dopaquinone.
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Match the term to the most correct definition. The process of determining the future value of an investment made today: The process of determining the present value of money to be received in t future: Equal periodic payments of principal and interest to repay any investment: The periodic repayment of principal and interest for a given loan: This TVM calculator key is used to enter or compute periodic level payments, such as monthly payments on a fixed rate mortgage: The value of a stream of payments and/or single future amount to be received over a specified number of discounting periods: The sum of the present values of all future cash flows, netted against the initial investment: The general term for the annual return provided by cash flows such as stock dividends or bond coupon payments: The general term for the annual return provided by the growth or increase in value of the investment itself, separate from annual cash flows: The percentage rate earned on each dollar invested for the entire time it is invested, this includes both the periodic and appreciation return:
Answers
The process of determining the future value of an investment made today is called compounding.
Compounding refers to the process of calculating the future value of an investment by considering the initial amount invested, the interest rate, and the time period. It takes into account the concept of earning interest on both the principal amount and any accumulated interest. Through compounding, the investment grows over time as the interest is added to the principal, generating additional returns. This allows investors to estimate the value of their investment at a future date, taking into account the effects of compound interest. It is an essential concept in finance and helps individuals and businesses make informed decisions regarding their investments.
In compounding, the future value of an investment is determined by considering factors such as the interest rate, the length of the investment period, and the frequency of compounding. The more frequent the compounding, the greater the future value of the investment. This concept is widely used in various financial calculations, such as calculating the growth of savings accounts, estimating the value of retirement funds, or assessing the profitability of long-term investments. Compounding allows investors to understand the potential growth of their investments over time and make strategic decisions accordingly. It highlights the power of time and compound interest in generating wealth and achieving financial goals.
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