LABORATORY REVIEW
DIFFUSION AND OSMOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What are 2 substances that can pass through a cell membrane?
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oxygen and carbon dioxide
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fats and starch
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chlorophyll and water
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none of the above
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Explanation:
Detailed explanation-1: -Only the smallest molecules like water, carbon dioxide, and oxygen can freely diffuse across cell membranes.
Detailed explanation-2: -Gases like carbon dioxide and oxygen can move across the cell membrane via diffusion. Diffusion is the movement of gas molecules from a region of higher concentration, to a region of lower concentration through a semi-permeable membrane.
Detailed explanation-3: -Oxygen diffuses through the cell membrane and is transported in blood plasma by free diffusion and by convection.
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