quiz 3 Flashcards
Hyper polarization…moving from the RMP
if charge difference increases moving RMP to even more negative value
Graded DPotentials are… are triggered by…
localized changes in membrane potential
triggered by change in neurons local environment
An action potential is … it usually lasts about…
rapid and substantial depolarization of neurons membrane
1ms
All action potentials begin as…
graded potentials
2 characteristics… we consider how quickly an impulse can pass…
of the neuron determine how quickly
along the axon mylenation and diameter
Myelin Sheath is formed…
by specialized cells called Schwann cells
A-P jumping from node to node
as it traverses a mylinated fiber
Disease from degeneration of myelin sheath…
MS
Velocity of transmission- determined by…
neurons size
Site of action potential transmission… two types of synapses…most common
FIND ANWER
Motor neuron communicates with muscle at the site…
neuromuscular junction
2 major neurotransmitters regulating responses to exercise
Acetylcholine
Norepenepherine
Acetylcholine…excitatory and inhibitory
is primary NT for Motor Neuron that innervates skeletal muscle and parasympathetic autonomous nerves.
excitatory in somatic
inhibitory in parasympathetic
Cerebrum… fiber bundles (tracts ) referred to as…. and allows
left and right hemispheres connected by corpus callosum
2 hemispheres to comunicate with each other
the cerebral cortex is the… it allows people to…
conscious brain
think, be aware of stimulus and voluntary control of movement
