Biology Unit 2 : Movement into and out of cells

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4 Terms

1
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diffusion

the net movement of particles from a region of their higher concentration to a region of their lower concentration as a result of their random movement

2
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factors that influence diffusion

surface area, temperature, concentration gradient and distance

3
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osmosis

the 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

4
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active transport

the movement of particles through a cell membrane from a region of lower concentration to a region of higher concentration using energy from respiration