Multiple Choice
In passive transport, what is the primary driving force for diffusion of molecules across space or a membrane?
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9. Transport Across Membranes
Passive Transport: Diffusion and Osmosis
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In passive transport, diffusion causes molecules to move in which direction?
A
Only through membrane pumps that require ATP.
B
From an area of lower concentration to an area of higher concentration (against the concentration gradient).
C
Only from the extracellular space into the cell, regardless of concentration.
D
From an area of higher concentration to an area of lower concentration (down the concentration gradient).
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Passive Transport: Diffusion and Osmosis practice set
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