Ch 8 - Skeletal, Nervous, Muscular

Question 1

In order for an impulse to move from one neuron to another, myelin must be released.

True
False

Answer 1

False

Question 2

Dendrites conduct electrical impulses toward the cell body.

True
False

Answer 2

True

Question 3

Neurons can transmit impulses because they are connected.

True
False

Answer 3

False

Question 4

Neurotransmitters are released to carry impulses from one neuron to another.

True
False

Answer 4

True

Question 5

There is only one axon in a neuron, but there can be hundreds of dendrites.

True
False

Answer 5

True

Question 6

Stabilization of the deltoid muscles helps prevent subluxation of the humeral head from the glenoid fossa.

True
False

Answer 6

False

(Primary stabilizers of the humeral head are the rotator cuff muscles.)

Subluxation = dislocation

Question 7

The posterior fibers of the deltoid extend and laterally rotate the humerus.

True
False

Answer 7

True

Question 8

The muscles of the rotator cuff originate on the scapula.

True
False

Answer 8

True

Question 9

When the rhomboids stabilize the scapula, the teres major can internally rotate the humerus.

True
False

Answer 9

True

Question 10

The hamstring muscle group assists with knee extension.

True
False

Answer 10

False

Question 11

The sartorius functions at both the hip and knee joints.

True
False

Answer 11

True

Question 12

Flexion and external rotation at the knee are performed by the biceps femoris.

True
False

Answer 12

True

Question 13

The four quadriceps muscles each have their own insertion point.

True
False

Answer 13

False

Question 14

GTOs are sensory receptors located ____________________.

Answer 14

Between the muscle belly and its tendon

Question 15

GTOs respond to muscle tension by causing the muscle to _______.

Answer 15

Relax

Question 16

Golgi tendons cause _________ when the muscle contraction ceases.

Answer 16

Autogenic inhibition

Question 17

During ________ stretching, the activation of the GTOs cause the muscle spindles to relax, thus increasing the stretch.

Answer 17

Static

Question 18

Muscle spindles are located ________.

Answer 18

Parallel to the muscle fibers.

Question 19

Muscle spindles respond to muscle fibers being overstretched by causing a ___________, known as the ___________.

Answer 19

muscular contraction; stretch reflex

Question 20

When the muscle spindle’s reflex contraction occurs, it causes the antagonist muscle group to relax. This is called ___________ .

Answer 20

reciprocal inhibition.

Question 21

Type 1 muscle fibers are considered slow-twitch.

True
False

Answer 21

True

Question 22

Type 1 muscle fibers have a small amount of mitochondria compared to Type 2 muscle fibers.

True
False

Answer 22

False

Question 23

Type 1 muscle fibers are fatigue-resistant.

True
False

Answer 23

True

Question 24

Type 1 muscle fibers are used during anaerobic metabolism.

True
False

Answer 24

False

Question 25

Endurance athletes generally possess a large percentage of Type 1 muscle fibers. True False

Answer 25

True

Question 26

Type IIx muscle fibers are considered fast-twitch. True False

Answer 26

True

Question 27

Type IIx muscle fibers are known as fast-glycolytic fibers. True False

Answer 27

True

Question 28

Type IIx muscle fibers have a small amount of mitochondria. True False

Answer 28

True

Question 29

Type IIx muscle fibers are less resistant to fatigue than type I fibers. True False

Answer 29

True *keyword - LESS resistant (IIx cannot sustain effort for more than a few seconds)

Question 30

Type IIx muscle fibers are the largest and fastest muscle fibers in the body. True False

Answer 30

True

Question 31

Type IIx muscle fibers have a limited capacity for aerobic metabolism. True False

Answer 31

True

Question 32

Type IIa muscle fibers are fast-twitch muscle fibers. True False

Answer 32

True

Question 33

Type IIa muscle fibers can be trained to be more oxidative or glycolytic. True False

Answer 33

True

Question 34

Type IIa muscle fibers can only sustain activity for less than 30 seconds. True False

Answer 34

False