Homework Answers
This statement is false because oxygen diffuses from alveoli into capillaries. This is because , the partial pressure of oxygen is more in the alveoli and low in capillaries. As a result oxygen diffuses from alveoli into capillaries.
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1 point Oxygen moves out of the capillaries into the alveoli by the process of diffusion....
During respiratory exchange, carbon dioxide moves from the blood into the alveoli due to: the presence...
During respiratory exchange, carbon dioxide moves from the blood into the alveoli due to: the presence of a permease , which removes carbon dioxide from the capillaries. the contraction of the diaphragm, which creates a vacuum that pulls it out. diffusion down a concentration gradient. the air pressure of dissolved oxygen, which forces it out. two of the choices are correct
The small capillaries in the lungs are in close contact with the alveoli. A red blood...
The small capillaries in the lungs are in close contact with the alveoli. A red blood cell takes up oxygen during the 0.5 s that it squeezes through a capillary at the surface of an alveolus. What is the diffusion time for oxygen across the 1-μm -thick membrane separating air from blood? Assume that the diffusion coefficient for oxygen in tissue is 2×10−11m2/s. Give your answer to 1 significant figure.
the pathway of oxygen from the alveoli across the respiratory membrane to the capillaries is
the pathway of oxygen from the alveoli across the respiratory membrane to the capillaries is
III. Diffusion in Capillaries Consider a capillary in an alveolus in the lung. The density of oxygen inside the capi...
III. Diffusion in Capillaries Consider a capillary in an alveolus in the lung. The density of oxygen inside the capillary is 0.30 million molecules per cubic micrometer, and in the air outside the density is 5.0 million molecules per cubic micrometer. A) Will oxygen molecules flow in both directions ncross the membrane? In which direction will there be a net flow of oxygen. Explain. B) If the flow rate of oxygen molecules across the capillary membrane is about 4.0 million...
Question 10 1 pts In tissue capillaries: the partial pressure gradients favor diffusion of O, out...
Question 10 1 pts In tissue capillaries: the partial pressure gradients favor diffusion of O, out of interstitial fluids and into blood and CO2 out of interstitial fluid and into blood, the partial pressure gradients favor diffusion of Os out of interstitialfluids and into blood and CO, out of blood and into interstitial fluid, the partial pressure gradients favor diffusion of O, out of blood and into interstitial fluids and CO, out of blood and into interstitial fluid. the partial...
At what point is the amount of oxygen at its highest? in the capillaries during strenous...
At what point is the amount of oxygen at its highest? in the capillaries during strenous activity in the lungs in the capillaries at rest in muscle tissue during strenous activity
The correct path of carbon dioxide moving out from the interior of the body is: alveoli,...
The correct path of carbon dioxide moving out from the interior of the body is: alveoli, bronchioles, bronchi, trachea, larynx, pharynx. True False Question 22 1 pts When you breath gently, exhalation results mainly from the relaxation of the chest muscles and diaphram, and not from pushing the air out. True False
Question 6 (1 point) Which of the following statements are accurate? Oxygen is not the most...
Question 6 (1 point) Which of the following statements are accurate? Oxygen is not the most abundant gas in the atmosphere. Diffusion of gases is 'better' across single cells that are thin than layers of thin cells. Gas exchange in humans occurs in the lungs at the structures called alveoli. Diffusion of gas occurs from areas with a higher partial pressure to an area of lower partial pressure. Organisms with gills may use a countercurrent exchange mechanisms to extract more...
Nitrogen is more soluble in blood plasma than oxygen, so readily moves into the blood stream...
Nitrogen is more soluble in blood plasma than oxygen, so readily moves into the blood stream from the alveoli Select one: O True Next page
Fick's Law of diffusion (p. 137 Silverthorm) governs the rate at which oxygen moves from the...
Fick's Law of diffusion (p. 137 Silverthorm) governs the rate at which oxygen moves from the alveolar space to the blood where: Explain how each condition below affects gas exchange by indicating which factor affecting the rate of diffusion is influenced (surface area, concentration gradient, or membrane permeability.) In each case state whether the factor increases or decreases the rate of gas exchange. In addition to the properties of membranes above, you will also need to consider the factor of...
During respiratory exchange, carbon dioxide moves from the blood into the alveoli due to: the presence of a permease , which removes carbon dioxide from the capillaries. the contraction of the diaphragm, which creates a vacuum that pulls it out. diffusion down a concentration gradient. the air pressure of dissolved oxygen, which forces it out. two of the choices are correct
III. Diffusion in Capillaries Consider a capillary in an alveolus in the lung. The density of oxygen inside the capillary is 0.30 million molecules per cubic micrometer, and in the air outside the density is 5.0 million molecules per cubic micrometer. A) Will oxygen molecules flow in both directions ncross the membrane? In which direction will there be a net flow of oxygen. Explain. B) If the flow rate of oxygen molecules across the capillary membrane is about 4.0 million...
Question 10 1 pts In tissue capillaries: the partial pressure gradients favor diffusion of O, out of interstitial fluids and into blood and CO2 out of interstitial fluid and into blood, the partial pressure gradients favor diffusion of Os out of interstitialfluids and into blood and CO, out of blood and into interstitial fluid, the partial pressure gradients favor diffusion of O, out of blood and into interstitial fluids and CO, out of blood and into interstitial fluid. the partial...
The correct path of carbon dioxide moving out from the interior of the body is: alveoli, bronchioles, bronchi, trachea, larynx, pharynx. True False Question 22 1 pts When you breath gently, exhalation results mainly from the relaxation of the chest muscles and diaphram, and not from pushing the air out. True False
Question 6 (1 point) Which of the following statements are accurate? Oxygen is not the most abundant gas in the atmosphere. Diffusion of gases is 'better' across single cells that are thin than layers of thin cells. Gas exchange in humans occurs in the lungs at the structures called alveoli. Diffusion of gas occurs from areas with a higher partial pressure to an area of lower partial pressure. Organisms with gills may use a countercurrent exchange mechanisms to extract more...
Nitrogen is more soluble in blood plasma than oxygen, so readily moves into the blood stream from the alveoli Select one: O True Next page
Fick's Law of diffusion (p. 137 Silverthorm) governs the rate at which oxygen moves from the alveolar space to the blood where: Explain how each condition below affects gas exchange by indicating which factor affecting the rate of diffusion is influenced (surface area, concentration gradient, or membrane permeability.) In each case state whether the factor increases or decreases the rate of gas exchange. In addition to the properties of membranes above, you will also need to consider the factor of...
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