NS Flashcards
Measurement of -70mV known as
Resting membrane potential
Sodium ions move into cell across neurolemma, creating reversal of positive and negative charges. This results in ___________ of the membrane
Depolarization
This change in membrane results in an ____________ potential
Action
A stimulus peaks at __________ mV
+30
As stimulus downgrades, +K ions continue to move out of cell across neurolemma. This results in __________ of the membrane
Repolarization
In order for neuron to recharge, must exceed -70 mV, this is known as ______________
Hyperpolarization
In order to establish gradient, the cells are equipped with ______ ________ __________, which rely upon the energy of ATP the polarity
Sodium Potassium Pump
Electrical stimulus, _________ gated channel
Voltage
Chemical stimulus, ____________ gated channel
Chemically
Chemical causing nerve impulse is a ____________
Neurotransmitter
Skeletal muscle chemical that stimulates muscle contraction is ___________
Acetylcholine
ANS will rely on ________ to stimulate involuntary muscle contraction or glandular secretion
Norepinephrine
Pre central gurus- motor stimulation of skeletal muscle. Region of cortex called ________ ________ cortex
Primary motor
Post central gyrus, responsible for sensory interpretation, called the _______ __________ cortex
Primary somatosensory
Craniosacral fibers form what division of ANS
Parasympathetic
Thoracolumbar (t1-l2) form what division of ANS
Sympathetic
ANS division controls digestion
Parasympathetic
ANS division controls pupillary dilation, increases heart rate, results in bronchodilation
Sympathetic
A nerve stimulus is generated when a _______________ of -55mV is reached
Threshold
Cartoonish illustration
Homunculi
Outermost layer of nerve
Epineurium
Bundle of nerve fibers
Fascicle
Covering around fascicles
Perineurium
Cranial nerve- controls pupillary response and lens shape
Oculomotor
