their actibity "affect" what will happen next (into the CNS)
PNS = Efferent Neurons??
"effecting" change movement, secretion, ect., projecting out of the CNS
CNS = Interneurons??
function as integrators & signal changers
99% of all neurons
A single neruron postsynaptic to one cell can bepresynaptic to another cell.
The size of a graded potential is proportionate to the_________.
intensity of the stimulus.
*Graded potential decay as they move over distance.
Graded potentials can be;
Excitatory (action potential is more likely)
Inhibitory (action potential is less likely)
Depolarization for action potential is???
Opening Na- (sodium) channels for __________.
Opening K+ (potassium) channels for____
The rapid openning of voltage-gated Na+ channels explains the __________ phase at the begining of the action potential.
The slower openning of voltage-gated K+ channels explains the ___________ and sfter hyperpolarization phases that complete the action potential.
The propagation of the action potential from the dendritic to the axon-terminal end is typically_______ because the absolute refractory period follows alongin the "wake" of the moving action potential.
PNS = Somatic Division...
-Innervates skeletal muscle
-only muscle excitation
PNS= Autonomic Division
-Innervates smooth & cardic muscle, glands & GI neurons