chp 3 Flashcards
why fluid mosaic model
proteins arranged in mosaic pattern
proteins and phospholipids free to move sideways
cholesterol function
stronger,more flexible, less permeable to water soluble substances
p.m permeable to
lipid soluble (non-polar) and small,uncharged molecules
water through
osmosis
oxygen and carbon dioxide through
simple diffusion
charges ions through
active/facilitated -carrier/pore protein
large molecules through
facilitated diffusion
osmosis definition
net movement of water molecules from a region of high conc. to a region of low conc. through a semi permeable membrane
facilitated diffusion definition
movement of moleucles/ions across the p.m
simple diffusion definition
net movement of molecules or ions from a region of high conc. to a region of low conc.
characteristic of carrier protein
specific, have binding sites,
characteristic of pore protein
always open, specific shape + charge
animal cell in hypotonic
haemolysis
plant cell in hypotonic
turgid
animal cell in hypertonic
crenation
