LA 4

describes rotational tumbling and flexing of phopholipid fatty acyl groups

fluidity

insulating portion of membrane corresponds to

1. hydorcarbon tails of phospholipids
2. charged and polar ends of the lipids at membrane surface

protein macromolecules of channel exist in 3 conformations

1. resting state
2. open state
3. inactive state

membrane polarizes to its resting potential

resting state

nerve is stimulated and reversal of membrane potential

open state

return of na channel to impermeable state

inactive state

with saltatory conductin it is what

all or nothing

unmyelinated fibers require achievement of threshold potential at?

immediately adjacent membrane

conduction is slow in unmyelinated nerve d/t

resistive and capacitative current losses.