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Questions and Answers
Passive transport mechanism requires energy to move substances across the cell membrane
Passive transport mechanism requires energy to move substances across the cell membrane
False (B)
Facilitated diffusion is a type of passive transport mechanism
Facilitated diffusion is a type of passive transport mechanism
True (A)
Active transport mechanism moves substances along the concentration gradient
Active transport mechanism moves substances along the concentration gradient
False (B)
Simple diffusion can occur through both the lipid and protein layers of the cell membrane
Simple diffusion can occur through both the lipid and protein layers of the cell membrane
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Cell membranes can be either permeable or semipermeable to substances
Cell membranes can be either permeable or semipermeable to substances
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Study Notes
Cell Membrane Transport Mechanisms
- Passive transport mechanisms do not require energy to move substances across the cell membrane.
- Facilitated diffusion is a specific type of passive transport mechanism.
- Active transport mechanisms move substances against their concentration gradient, requiring energy.
- Simple diffusion can occur through both the lipid and protein layers of the cell membrane.
Cell Membrane Permeability
- Cell membranes can be either permeable or semipermeable to substances, affecting the flow of molecules across the membrane.
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