Multiple Choice
The plasma membrane by itself is impermeable to all charged molecules.
9. Transport Across Membranes
Passive Transport: Diffusion and Osmosis
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Which of the following describes the diffusion of water across a membrane?
A
Simple Diffusion
B
Facilitated Diffusion
C
Osmosis
D
Uniporters
Verified step by step guidance1
Understand that diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.
Recognize that osmosis is a specific type of diffusion that involves the movement of water molecules across a selectively permeable membrane.
Identify that in osmosis, water moves to balance solute concentrations on either side of the membrane, moving from a region of low solute concentration to a region of high solute concentration.
Differentiate osmosis from simple diffusion, which involves the movement of solutes, and facilitated diffusion, which requires transport proteins.
Conclude that osmosis is the correct term to describe the diffusion of water across a membrane, as it specifically refers to water movement.
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Passive Transport: Diffusion and Osmosis practice set
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