chapter 6 Flashcards

1
Q

Does a single muscle fiber must contract completely when activated?

A

yes

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2
Q

What portion of the muscle contracts to bring movement?

A

Myofilaments

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3
Q

Lighter colored band of the skeletal muscle?

A

I

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4
Q

Part of the hamstring group

A

Biceps fermoris, semimembranosus, semitendinosus

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5
Q

Gap between the nerve and muscle

A

synaptic cleft

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6
Q

Chemical that causes our muscles to be sore

A

lactic acid

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7
Q

What point of muscle attachment is the moveable bone?

A

Insertion

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8
Q

Closes eyes, squints, blinks, winks

A

Orbicularis Oculi

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9
Q

Closes the jaw by raising the mandible

A

masseter

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10
Q

Closes mouth, puckers lips

A

Orbicularis Oris

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11
Q

Lowers the corners of the mouth

A

Platysma

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12
Q

Raises the corners of the mouth

A

zygomaticus

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13
Q

Raises the eyebrows

A

frontalis

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14
Q

Rotates head

A

Sternocleidomastoid

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15
Q

Flattens cheek, moves food from cheek during chewing

A

Buccinator

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16
Q

Joined with others at an intercalated disc

17
Q

Voluntary

18
Q

Lack striations

19
Q

Located around many hollow organs

20
Q

Located in the heart

21
Q

Multinucleate

22
Q

Spindle-shaped

23
Q

Tires easily

24
Q

Movement away from body

25
Decreasing the angle between bones
Flexion
26
Movement along a longitudial axis, such as shaking head no
rotation
27
Touching thumb to tip of fingers on the same hand
opposition
28
Palms facing forward anterior-anatomical position
Supination
29
Single brief contraction
twitch
30
Most common cause of muscle fatique
Oxygen debt
31
Muscle that undoes a movement
antagonist
32
Excitability
Ability to receive and respond to stimuli
33
Contractility
Ability to shorten when an adequate stimulus is received
34
Extensibility
Ability of a muscle to be stretched
35
Elasticity
Ability to recoil and resume resting length after stretching
36
What is the chemical called the nuerotransmitter releases to aid in skeletal muscle contraction?
Acetylcholine