movement in and out of cells - key terms Flashcards

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1
Q

Define diffusion

A

Net movement of particles down the concentration gradient (high → low) as a result of their random movement.

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2
Q

Define osmosis

A

Net movement of water molecules from a region of higher water potential (dilute solution) to a region of lower water potential (concentrated solution) through a partially permeable membrane.

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3
Q

Define active transport

A

Movement of particles through a cell membrane from a lower concentration region to a higher concentration region (i.e., against a concentration gradient), using energy from respiration.

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