Multiple Choice
Which process moves water molecules across the cell membrane down their concentration gradient?
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6. The Membrane
Osmosis
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What is the term for the movement of water across a cell membrane?
A
Facilitated diffusion
B
Osmosis
C
Active transport
D
Diffusion
Verified step by step guidance1
Understand that the movement of water across a cell membrane is a specific type of passive transport.
Recall that passive transport does not require energy and occurs along the concentration gradient.
Identify that osmosis is the term used to describe the movement of water molecules through a selectively permeable membrane.
Differentiate osmosis from other types of transport: facilitated diffusion involves transport proteins, active transport requires energy, and diffusion refers to the movement of solutes.
Conclude that osmosis is the correct term for the movement of water across a cell membrane.
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