Question

The oxygen and carbon dioxide crosses the plasma membrane by the process of
a) Active diffusion
b) Facilitated diffusion
c) Passive diffusion
d) Random diffusion

Answer 1

Explanation:

Oxygen and carbon dioxide move across cell membranes via simple diffusion, a process that requires no energy input and is driven by differences in concentration on either side of the cell membrane.

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Answer 2

The Oxygen and carbon dioxide crosses the plasma membrane by the process of active diffusion.

Option a.

Explanation:

• diffusion is the movement of the substances from the region of the higher concentration to the to the region of lower concentration.

• The gases usually cross the plasma membrane by the process of active diffusion.

• By this process when the concentration of oxygen decreases in the cell it moves from the corresponding blood vessel inside the the cell

• similarly when the amount of carbon dioxide in a cell increases it diffuses out of the cell into the blood vessels from which it is excreted.

To know more about diffusion,

Define osmosis . In which two ways it is different from diffusion .

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