Muscular system Flashcards

1
Q

Prefixes myo and mys refer to

A

Muscle

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2
Q

Prefix sarco refers to

A

Flesh

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3
Q

Attached to bones, facial muscle

A

Skeletal muscle

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4
Q

Wall of heart

A

Cardiac muscle

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5
Q

Hallow visceral organ and its single nucleus

A

Smooth muscle

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6
Q

Muscle cell

A

Muscle fiber

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7
Q

have visible banding

A

Striated

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8
Q

Enclose single muscle fiber

A

Endomysium

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9
Q

wraps around a fascicle
(bundle) of muscle fibers

A

Perimysium

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10
Q

Cover the entire skeletal muscle

A

Epimysium

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11
Q

Cord like structure

A

Tendons

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12
Q

Sheet like structure

A

Aponeurosis

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13
Q

Specialized plasma membrane

A

Sarcolemma

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14
Q

Long organelles inside muscle cell

A

Myofibrils

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15
Q

specialized
smooth endoplasmic reticulum

A

Sarcoplasmic reticulum

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16
Q

light band
 Contains only thin filaments

A

I band

17
Q

dark band
 Contains the entire length of the thick filaments

A

A band

18
Q

contractile unit of a
muscle fiber

A

Sarcomere

19
Q

Thick filaments

A

myosin filaments

20
Q

Thin filaments

A

actin filaments

21
Q

Composed of the protein myosin
 Has ATPase enzymes
 Myosin filaments have heads (extensions, or cross
bridges)
 Myosin and actin overlap somewhat

A

myosin filaments

22
Q

Composed of the protein actin
 Anchored to the Z disc

A

actin filaments

23
Q

Stores and releases calcium
 Surrounds the myofibril

A

Sarcoplasmic reticulum (SR)

24
Q

ability to receive and respond to a
stimulus

A

Excitability

25
Q

ability to shorten when an adequate
stimulus is received

A

Contractility

26
Q

ability of muscle cells to be stretched

A

Extensibility

27
Q

ability to recoil and resume resting
length after stretching

A

Elasticity

28
Q

one motor neuron and all the
skeletal muscle cells stimulated by that
neuron

A

Motor unit

29
Q

Association site of axon
terminal of the motor neuron
and muscle

A

Neuromuscular junction

30
Q

Gap between nerve and muscle
Nerve and muscle do not make
contact
Area between nerve and muscle
is filled with interstitial fluid

A

Synaptic cleft

31
Q

chemical released by nerve
upon arrival of nerve impulse

A

Neurotransmitter

32
Q

The neurotransmitter for skeletal muscle is

A

acetylcholine (AcH)

33
Q

Sarcolemma becomes permeable to

A

sodium
(Na+)

34
Q
A
35
Q
A