nervous Flashcards
what is the charge inside a typical cell
negative relative to the outside
what are local signals
siangals that dont cross threshold
what are nervous system signals
brief changes in electrical potential differnce across plasma membrane of neurons that causes the firing of an action potential
what are nervous system signals
brief changes in electrical potential differnce across plasma membrane of neurons that causes the firing of an action potential
what is a saltatory conduction
jumping
what is deporarization of a cell membrane
the inside of the cell becoming less negative
what is the differnce between an electrical and chemical synapse
electrical: signal diffuses through gap junctions
chemical: signals target neurotransmitters in vesicles that go to post synaptic cell receptors
what is temporal stimulation
stimulus at the same location multiple times
what is spactial stimulation
multiple stimulas at the same time at different locations
what is the most common excitatory neurotransmitter
glutamate
what is the most common inhibitory neurotransmitter
GABA
what causes the depolarization in the cell membrane
Na+ influx
what returns the cell membrane to resting potential
Cl- influx
what are action potentials
all or none signals that propogate long distances regenerativly
