Neurophysio - Muscles

Question 1

___ slide across each other to contract muscles

Answer 1

Myofilaments

Question 2

one contractile unit of the muscle fibers are called

Answer 2

sarcomeres

Question 3

three main parts of a neuromuscular junction

Answer 3

1. motor neuron axon
2. motor end plate
3. synaptic cleft

Question 4

Product of communication across neuromuscular junction is a __ __

Answer 4

muscle twitch

Question 5

Once muscle is activated, ____ gets released into thick myofilaments, which results in shortening of muscle

Answer 5

calcium

Question 6

Two basic types of muscle fibers: ___ twitch and __ twitch

Answer 6

slow; fast

Question 7

Slow twitch muscle fibers remain contracted ___ longer than fast twitch muscle fibers

Answer 7

5x

Question 8

slow twitch muscle fibers are often found in muscles involved in ____, whereas fast are found in muscles for ___

Answer 8

posture; fine/rapid muscle action

Question 9

what is the function of muscle spindles?

Answer 9

give feedback to neuromotor system about muscle length, therefore info about motion and position

Question 10

combo of muscle and sensor, named because of shape

Answer 10

Muscle spindle

Question 11

____ muscles are inside ___ muscles, and they have sensors that sense changes in stretch

Answer 11

intrafusal; extrafusal

Question 12

two types of muscle lengthening

Answer 12

phasic and tonic

Question 13

this type of muscle lengthening involves changing muscle length

Answer 13

phasic

Question 14

this type of muscle lengthening involves maintaining muscle length/condition

Answer 14

tonic

Question 15

type of muscle sensor located at tendon, sensitive to degree of tension

Answer 15

golgi tendon organ (GTO)

Question 16

this type of muscle sensor is located in the tendon

Answer 16

golgi tendon organ

Question 17

In sensory receptors, nerve endings are specialized to transduce energy…

Answer 17

from one form to another