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During gas exchange:Oxygen moves up a concentration gradient from the air in the alveoli to the bloodOxygen moves down a concentration gradient from the blood to the air in the alveoliOxygen moves down a concentration gradient from the air in the alveoli to the bloodOxygen moves up a concentration gradient from the blood to the air in the alveoliCHECK YOUR ANSWERS

Question

During gas exchange:Oxygen moves up a concentration gradient from the air in the alveoli to the bloodOxygen moves down a concentration gradient from the blood to the air in the alveoliOxygen moves down a concentration gradient from the air in the alveoli to the bloodOxygen moves up a concentration gradient from the blood to the air in the alveoliCHECK YOUR ANSWERS

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Solution

The correct answer is: Oxygen moves down a concentration gradient from the air in the alveoli to the blood.

Here's the step by step explanation:

  1. Oxygen is inhaled into the lungs, where it fills the alveoli, the tiny air sacs in the lungs.

  2. The oxygen in the alveoli is at a higher concentration than the oxygen in the blood in the capillaries surrounding the alveoli.

  3. Due to this concentration difference, oxygen moves from an area of high concentration (the alveoli) to an area of low concentration (the blood). This is known as moving down a concentration gradient.

  4. The oxygen is then carried by the blood to the rest of the body where it is needed.

So, the statement "Oxygen moves down a concentration gradient from the air in the alveoli to the blood" is correct.

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Similar Questions

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

Describe how gas exchange occurs at the alveoli

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.

The exchange of oxygen and carbon dioxide between alveolar air and blood occurs via;

Gas exchange in all cells involves the movement of gasesMultiple choice question.directly from the atmosphere into the cell.with the help of hemoglobin.with the help of a specialized protein (not necessarily always hemoglobin).across cellular membranes.

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