lecture 8 Flashcards
what is a membrane protein
proteins associated with membrane
what are the functions of the membrane protein
transport
enzymatic activity
signal transduction
attachment and recognition
what are enzymatic activity
number of enzymes are membrane proteins
what are signal transduction
receptor proteins bind to outside chemical and triggers change inside leading to transduction
what are attachments and recognition
proteins act as attachment points for range of cytoskeleton
what is transport
protein provide channel allowing movement of specific molecules
what are integral membrane protein
protein embedded phospholipid bilayer
what are transmembrane proteins
proteins that transverse entire lipid bilayer at once
what is passive transport
movement of molecules across membrane without ATP
what is simple diffusion
movement of molecule directly across membrane without transporter
what is facilitated diffusion
diffusion of molecules across membrane through transporter
what are channel proteins
hydrophilic pathways in membrane through molecules pass through
aquaporin
transport of water cell
what is a gated channel
channel protein found in eukaryotes
what are carrier proteins
control muscle contractions
what is uniport transport
transport solutes across lipid bilayer
what is hypotonic
solution surrounding cell contains dissolved substance at lower then cell concentration
what is hypertonic
solution surrounding cell contain higher concentration in cell than out
what is active transport
transport of molecules across membrane that requires ATP
3 function of active transport
-maintain contrast concentration
-removal of waste
-uptake of nutrients
what is membrane potential
ion charge
what is primary active transport
proteins that transport molecules directly powered by ATP
what is secondary active transport
transport indirectly driven by ATP
