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Questions and Answers
Diffusion through channels allows water and charged ions to pass through the plasma membrane without assistance
Diffusion through channels allows water and charged ions to pass through the plasma membrane without assistance
False
Facilitated diffusion requires cellular energy to transport molecules down their concentration gradient
Facilitated diffusion requires cellular energy to transport molecules down their concentration gradient
False
Active transport moves molecules across a selectively permeable membrane against a concentration gradient
Active transport moves molecules across a selectively permeable membrane against a concentration gradient
True
Voltage-gated ion channels open when the ionic charge across the membrane changes
Voltage-gated ion channels open when the ionic charge across the membrane changes
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Chemically gated ion channels require a signal to open or close them
Chemically gated ion channels require a signal to open or close them
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