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21 Cards in this Set
- Front
- Back
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Passive Transport |
energy not required use energy from collisions mostly "downhill" |
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Active Transport |
energy required against [gradient] |
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Diffusion |
type of passive transport molecules "spread" through membranes [high] to [low] down [gradient] dynamic equilibrium |
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Simple Diffusion |
moves molecules from [high] to [low] |
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Facilitated Diffusion |
same as simple diffusion but uses protein carrier molecules |
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Osmosis |
-movement of water through a selectively permeable membrane -limits particles |
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Aquaporin |
-helps water get through cell membrane -makes membrane capable of allowing water through |
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Osmotic Pressure |
-more volume = more pressure -water pressure that develops due to osmosis -pressure required to maintain equilibrium with no net movement of solvent |
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Hypotonic |
water goes into cell |
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Hypertonic |
water goes out of cell |
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Isotonic |
balanced |
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Dialysis |
puts fresh dialysis fluid into body people who need dialysis tend to retain water |
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Channel Mediated Passive Transport |
membrane channels down [gradient] gated > can be opened or closed various triggering mechanisms normally a one way channel |
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Carrier Mediated Passive Transport |
membrane carrier proteins down [gradient] binding and shape change usually reversible use size, shape, and charge to detect |
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Filtration |
-passive -water & solutes through membrane -energy form hydrostatic pressure forces particles through
ie. capillaries |
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Na-K Pump |
Na outside cell K inside cell |
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Active Transport by Vessicles |
-molecules moved w/o moving through membrane -bulk transport 2 types >endocytosis |
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Endocytosis |
cytoskeleton does work "engulf" molecule 2 types > pinocytosis > phagocytosis |
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Pinocytosis |
"cell drinking" |
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Phagocytosis |
"cell eating" |
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Exocytosis |
large molecules leave cell fuse and released
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