In the alveoli with low ventilation to perfusion ratio:Question 8Select one:a.The blood leaving the alveoli has lower CO2 than the blood entering the alveoli.b.The blood leaving the alveoli has the same CO2 as the blood entering the alveoli.c.The blood leaving the alveoli has higher O2 than the blood entering the alveoli.d.The blood leaving the alveoli has higher CO2 than the blood entering the alveoli.
Question
In the alveoli with low ventilation to perfusion ratio:Question 8Select one:a.The blood leaving the alveoli has lower CO2 than the blood entering the alveoli.b.The blood leaving the alveoli has the same CO2 as the blood entering the alveoli.c.The blood leaving the alveoli has higher O2 than the blood entering the alveoli.d.The blood leaving the alveoli has higher CO2 than the blood entering the alveoli.
Solution
The correct answer is:
d. The blood leaving the alveoli has higher CO2 than the blood entering the alveoli.
Here's why:
The ventilation-perfusion ratio (V/Q) is a measure of the efficiency of gas exchange in the lungs. When this ratio is low, it means that there is less air reaching the alveoli (ventilation) compared to the amount of blood flow (perfusion).
In this scenario, the blood flowing through the alveoli has less opportunity to exchange gases with the air in the alveoli. As a result, the blood leaving the alveoli would have a higher concentration of CO2 (which is a waste product of cellular metabolism that the blood is trying to get rid of) compared to the blood entering the alveoli.
On the other hand, the blood leaving the alveoli would have a lower concentration of O2 compared to the blood entering the alveoli, because there was less opportunity for the blood to pick up O2 from the air in the alveoli. This is not one of the answer choices, but it helps to understand the overall picture of what's happening in the alveoli with a low V/Q ratio.
Similar Questions
Which of the following correctly describes the events at the alveoli?Blood leaves the alveoli with a partial pressure of 45mmHg carbon dioxideBlood enters the alveoli with a partial pressure of 40mmHg carbon dioxideBlood leaves the alveoli with a partial pressure of 100mmHg oxygenBlood enters the alveoli with a partial pressure of 30mmHg oxygen
If the partial pressure of oxygen is greater in the alveoli than in the blood, which of the following will occur?
The concentration of carbon dioxide is higher in the alveoli than in the blood
For gas exchange to take place, the alveoli must have a ____i____ concentration of oxygen whilst the surrounding capillaries have a ____ii____ concentration of oxygen.
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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