Chapter 8: Control Of Movement

Question 1

are the ones that move us around and thus are responsible for our actions.

Answer 1

Skeletal muscles

Question 2

muscles are fastened to bones via _____, strong bands of connective
tissue.

Answer 2

Tendons

Question 3

moving a limb toward the body, is produced by contraction of flexor muscles.

Answer 3

Flexion

Question 4

the opposite movement or moving a limb away from the body, is
produced by contraction of extensor muscles.

Answer 4

Extension

Question 5

The so-called antigravity muscles, the ones we used to stand up.

Answer 5

Flexion and Extension

Question 6

the ones we used to stand up

Answer 6

Antigravity muscles

Question 7

theLatin word that means “spindle”

Answer 7

Fusus

Question 8

Muscles contract; limbs _____

Answer 8

Flex

Question 9

Limbs flex; Muscles _____

Answer 9

Contract

Question 10

Where intrafusal muscle fibers can be found?

Answer 10

within the spindles

Question 11

Where extrafusal
muscle fibers can be found?

Answer 11

outside the spindles

Question 12

What axon of the gamma motor neuron causes the intrafusal muscle fiber to contract?

Answer 12

The efferent axon

Question 13

Two types of muscle fibers

Answer 13

extrafusal muscle fibers
alpha motor neurons

Question 14

An alpha motor neuron, its axon, and associated extrafusal muscle fibers constitute ______

Answer 14

Motor unit

Question 15

A single muscle fiber consists of a bundle of ______.

Answer 15

Myofibrils

Question 16

Overlapping strands

Answer 16

Actin and myosin

Question 17

skeletal muscle is often referred to as _______.

Answer 17

Striated muscle

Question 18

The synapse between the terminal button of an efferent neuron and the membrane of a muscle fiber is called a ________.

Answer 18

Neuromuscular junction

Question 19

located in grooves along the surface of the muscle fibers.

Answer 19

Motor endplates

Question 20

When an axon fires, acetylcholine is liberated by the terminal buttons and produces a depolarization of the postsynaptic membrane.

Answer 20

Endplate potential

Question 21

always causes the muscle fiber to fire, propagating the potential along its lemgth

Answer 21

endplate potential

Question 22

Where are the stretch receptors are located within the tendons?

Answer 22

Golgi tendon organ