W9 peripheral nerve endings

Question 1

skeletal muscle motor unit is defined as a single what motor neuron and all the myofibers it innervates

may be only a few myofibers or several hundred

Answer 1

alpha motor neuron

Question 2

what is a synaptic connection between the terminal end of a motor nerve and a muscle (skeletal/ smooth/ cardiac). It is the site for the transmission of action potential from nerve to the muscle. It is also a site for many diseases and a site of action for many pharmacological drugs

Answer 2

neuromuscular junction

Question 3

autonomic axons contain clusters of synaptic vesicles along the course of the fiber (en passant) or in terminal what

Answer 3

terminal boutons

Question 4

parasympathetic nervous system is entirely what

Answer 4

cholinergic (denoting nerve cells in which acetylcholine acts as a neurotransmitter)

Question 5

neuromuscular junctions, preganglionic neurons of the SNS, the basal forebrain, and brain stem complexes all use what neurotransmitter

Answer 5

cholinergic (uses acetylcholine as the neurotransmitter)

Question 6

sympathetic nervous system cholinergic or adrenergic

Answer 6

cholinergic

Question 7

basal forebrain cholinergic or adrenergic

Answer 7

cholinergic

Question 8

adrenergic neurons use what as neurotransmitter

Answer 8

epinephrine/norepinephrine

Question 9

post-synaptic sympathetic neurons are cholinergic or adrenergic

Answer 9

adrenergic

Question 10

A beta afferent nerve fiber function

Answer 10

touch, pressure

Question 11

A delta afferent nerve fiber function

Answer 11

pain and temperature

Question 12

C dorsal root afferent nerve fiber function

Answer 12

pain and temperature

Question 13

A-delta fibers fast or slow adapting endings

Answer 13

fast and intermediate adapting endings

Question 14

C fibers fast or slow adapting endings

Answer 14

slowly adapting endings

Question 15

merkel cells

Answer 15

receptor for light touch and texture

Question 16

capsule of encapsulated nerve endings formed by what

Answer 16

perineurium

Question 17

ruffini corpuscle detect what

Answer 17

stretch (tension) and twisting (torque)

Question 18

ruffini receptors are the primary mechanoreceptors of what

Answer 18

periodontal ligament

Question 19

Pacinian corpuscle sensitive to what

Answer 19

sensitive to pressure and vibration

Question 20

meissner’s corpuscle sensitive to what

Answer 20

light touch and vibration

Question 21

specialized muscle fibers that detect distension (stretch) of the surrounding extrafusal fibers

Answer 21

intrafusal fibers

Question 22

beta, gamma for neuromuscular spindle intrafusal or extrafusal

Answer 22

intrafusal

Question 23

alpha

Answer 23

extrafusal