neuroscience exam 2 part1

adding EPSPs from different location

EPSPs arriving rapidly at same synapse

action potential-if voltage reaches threshold

action potential initaited here, and membrance voltage needs to reach 40mv for action potential firing.

distance in dendrite

inward movement of negatively charged chloride ions neutralizes EPSP

water loving,and water

building blocks of cell membrance

Choline,phosphate, and glycerol

2 long hydrocarbon tail

makes up the core of the cell membrance

small non-polar molecules, ex o2, co2,n2 and lipid bilayer impermeable to ions

• high conc of K+ inside
• low conc. of K+ outside

• high conc of Na+ outside
• low conc. of Na+ inside

to transport ions +other molecules across membrance

• -bind solute
• -conformation change to transfer across membrane

• -acqueous pore across bilayer
• -don't bind solute
• -faster rate of transport compared to transporters

DOWN

down concentration gradient

against concentration gradient requires energy

• -ions will not pass through bilayer
• -with channels in membrane diffusion will push ions through ion channel b/c concertration gradient
• -until even distribution on both sides.

• -moves NA+ and K+ aganist their concentration gradients
• -requires ATP
• -for every ATP:3 NA+ pumed out and 2K+ pumped in