Oxygen diffuses out of alveoli and into pulmonary capillaries because: Select on

Question

Oxygen diffuses out of alveoli and into pulmonary capillaries because: Select one: O a. There is a higher concentration of dissolved oxygen in the pulmonary capiliaries approaching alveol compared to the concentration of dissolved oxygen in alveoh O b. There is a lower concentration of dissolved oxygen in the pulmonary capillaries approaching alveoli compared to the concentration of dissolved axygen n alveoli O c Positive pressure is pushing oxygen from alveoli into the capillaries O d Negative pressure is drawing oxygen into capillaries from the alveol O e. Both 'at and b O t Both 'a and'c O g Both 'a and 'd O h Both b' and 'e O i Both 'b and 'd j. Both 'e' and 'd'

Explanation / Answer

The answer is BOTH B and D.

This is because the exchange of gases takes place by DIFFUSION.

This means that the gases travel from the region of higher concentration to the region of lower concentration.

Here the partial pressure of oxygen is higher in the alveoli as compared to the capillaries so the oxygen is diffused into the capillaries from the alveoli.

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