active transport Flashcards
active transport defenition
movement of mols across a membrane against concentration gradient using energy from the hydrolysis of ATP
what are cells performing active transport packed with
mitochondria
how does active transport occure
through intrinsic carrier proteins spanning the membrane
what is a limiting factor of active transport
number and availability of carrier proteins
what are some of the processes that active transport is a part of
muscle coordination
nerve impulse transimition
mineral uptake into plant root hairs
process of active transport
1 - mol combines with carrier protein
2 - carrier proteins changes shape to carry mol across membrane
3- mol released into cytoplasm
4 - phosphate ion released from carrier mol back to cytoplasm and recombines with adp to form atp
5 - carrier protein returns to its original shape
what prevents atp
addition of repiratory inhibitor
what do respiratory inhibitors prevent
ATP production in mitochondria
what is a subtopic of active transport
sodium potassium pump
what does the sodium potassium pump do
pumps sodium out of the cell and potas in
uses ATP as an energy source
what charge does sodium have
positive
what charge does potassium have
positive
where is the resting membrane potential lower in sodium potassium pump
outside
how many potassium bonding sites in sodium potassium pump
2
how many sodium bonding sites in sodium potassium pump
3
