chapter 6

Question 1

Does a single muscle fiber must contract completely when activated?

Answer 1

yes

Question 2

What portion of the muscle contracts to bring movement?

Answer 2

Myofilaments

Question 3

Lighter colored band of the skeletal muscle?

Answer 3

I

Question 4

Part of the hamstring group

Answer 4

Biceps fermoris, semimembranosus, semitendinosus

Question 5

Gap between the nerve and muscle

Answer 5

synaptic cleft

Question 6

Chemical that causes our muscles to be sore

Answer 6

lactic acid

Question 7

What point of muscle attachment is the moveable bone?

Answer 7

Insertion

Question 8

Closes eyes, squints, blinks, winks

Answer 8

Orbicularis Oculi

Question 9

Closes the jaw by raising the mandible

Answer 9

masseter

Question 10

Closes mouth, puckers lips

Answer 10

Orbicularis Oris

Question 11

Lowers the corners of the mouth

Answer 11

Platysma

Question 12

Raises the corners of the mouth

Answer 12

zygomaticus

Question 13

Raises the eyebrows

Answer 13

frontalis

Question 14

Rotates head

Answer 14

Sternocleidomastoid

Question 15

Flattens cheek, moves food from cheek during chewing

Answer 15

Buccinator

Question 16

Joined with others at an intercalated disc

Answer 16

Cardiac

Question 17

Voluntary

Answer 17

Skeletal

Question 18

Lack striations

Answer 18

Smooth

Question 19

Located around many hollow organs

Answer 19

smooth

Question 20

Located in the heart

Answer 20

Cardiac

Question 21

Multinucleate

Answer 21

Skeletal

Question 22

Spindle-shaped

Answer 22

smooth

Question 23

Tires easily

Answer 23

skeletal

Question 24

Movement away from body

Answer 24

abduction

Question 25

Decreasing the angle between bones

Answer 25

Flexion

Question 26

Movement along a longitudial axis, such as shaking head no

Answer 26

rotation

Question 27

Touching thumb to tip of fingers on the same hand

Answer 27

opposition

Question 28

Palms facing forward anterior-anatomical position

Answer 28

Supination

Question 29

Single brief contraction

Answer 29

twitch

Question 30

Most common cause of muscle fatique

Answer 30

Oxygen debt

Question 31

Muscle that undoes a movement

Answer 31

antagonist

Question 32

Excitability

Answer 32

Ability to receive and respond to stimuli

Question 33

Contractility

Answer 33

Ability to shorten when an adequate stimulus is received

Question 34

Extensibility

Answer 34

Ability of a muscle to be stretched

Question 35

Elasticity

Answer 35

Ability to recoil and resume resting length after stretching

Question 36

What is the chemical called the nuerotransmitter releases to aid in skeletal muscle contraction?

Answer 36

Acetylcholine