Which statements about gas exchange in the human lung are true?When you inhale there is a higher concentration of carbon dioxide in the alveoli than in the bloodOxygen and carbon dioxide diffuse through the walls of the alveoliOxygen diffuses from the blood into the alveoliWhen you inhale there is a higher concentration of oxygen in the alveoli than in the blood
Question
Which statements about gas exchange in the human lung are true?When you inhale there is a higher concentration of carbon dioxide in the alveoli than in the bloodOxygen and carbon dioxide diffuse through the walls of the alveoliOxygen diffuses from the blood into the alveoliWhen you inhale there is a higher concentration of oxygen in the alveoli than in the blood
Solution
The following statements about gas exchange in the human lung are true:
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Oxygen and carbon dioxide diffuse through the walls of the alveoli: This is true. The walls of the alveoli are very thin and permeable, allowing gases to easily diffuse across them.
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When you inhale there is a higher concentration of oxygen in the alveoli than in the blood: This is also true. When you inhale, air containing oxygen enters the alveoli. The oxygen concentration is higher in the alveoli than in the blood of the capillaries surrounding the alveoli, which causes oxygen to diffuse from the alveoli into the blood.
The following statements are false:
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When you inhale there is a higher concentration of carbon dioxide in the alveoli than in the blood: This is false. When you inhale, the concentration of carbon dioxide is actually lower in the alveoli than in the blood. This causes carbon dioxide to diffuse from the blood into the alveoli, from where it can be exhaled.
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Oxygen diffuses from the blood into the alveoli: This is also false. Oxygen actually diffuses from the alveoli into the blood, not the other way around. This is because the concentration of oxygen is higher in the alveoli than in the blood, driving the diffusion of oxygen into the blood.
Similar Questions
Which of the following statements regarding normal gas exchange in the lungs is correct?Question 9Answera.Oxygen and carbon dioxide diffuse across the alveolar walls and capillaries.b.Blood that returns to the lungs from the body has low levels of carbon dioxide.c.The actual exchange of oxygen and carbon dioxide occurs in the capillaries.d.The oxygen content in the alveoli is highest during the exhalation phase.
Recall what happens during gas exchange in the alveoli of the lungs. Carbon dioxide diffuses from air to bloodOxygen diffuses from air to bloodCarbon dioxide diffuses from blood to airOxygen diffuses from blood to air
Select the statement that is true about respirationDuring inhalation, ribs move inward and diaphragm is raised In the trachea, exchange of gases take placeHaemoglobin has greater affinity for carbon dioxide than oxygenAlveolus is the functional unit of the lung
Recall what happens during gas exchange in the alveoli of the lungs.
Alveoli are small sacs found in the lungs. The alveoli are where oxygen (O2) and carbon dioxide (CO2) are exchanged between the organism and the surrounding air.An alveolus is shown in the image below:Which of the following statements is false about the diffusion that occurs in the alveoli?Carbon dioxide will diffuse from an area of high concentration to where there is a low concentration of oxygen.Oxygen diffuses from an area of high concentration in the alveoli into an area of low concentration in the blood. The oxygen is later used in body cells for respiration.Carbon dioxide moves from an area of high concentration in the bloodstream to an area of low concentration in the alveoli. Carbon dioxide is a waste product from the process respiration.
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