-
phospholipid bilayer
allows fat to enter
-
top of phospholipid
- polar, hydrophillic (h2o loving)
- barrier: most things in cell is h20 loving
-
bottom of phospholipid bilayer
- nonpolar, hydrophobic (h2o hating)
- stabalizer
-
phospholipid bilayer keeps out
- large molecules
- h2o loving
- charged molecules/atoms (ions)
-
phospholipid bilayer lets through
- h2o haters
- small molecules
-
types of proteins
- facilitated diffusion
- enzyme
- active transport
- hormone
- attachment
- ID
-
structure of phospholipid
proteins embedded in
-
facilitated diffusion
- high concentration of large polar molecules
- change & make a channel that lets in large, polar, charged molecules
-
enzyme
changes molecule & results in chemical reaction
-
active transport
- can carry specific molecule into cell using energy
- low concentration of small polar molecule
-
hormone
- protein in recpetor/attachment site
- causes chemical change in cell
- messengers: prostate gland in neurotransmitter
-
attachment
chemical attached to protein never detaches
-
ID
- macrophage touches & destroys if no ID
- holder for cell ID
-
phagocytosis
- cell engulfs & brings in cells & particles
- lysosome digests bacteria
-
endocytosis
engulfs & brings in molecules
-
exocytosis
brings out molecule
-
osmosis
water moves to balance concentration
-
isomatic
even concentration
-
hypertonic
water leaving particle
-
hypotonic
water entering particle
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