Ch. 9 Vocab Flashcards

1
Q

Actin

A

protein that forms the thin filaments that contribute to muscle action

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2
Q

Cross-bridge

A

in muscle, myosin projections extending from thick filaments and capable of
exerting force on thin filaments, causing the filaments to slide past each other

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3
Q

Hypertrophy

A
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4
Q

Muscle fiber

A
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5
Q

Myofibrils

A
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6
Q

Myosin

A
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7
Q

Sarcomere

A
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7
Q

Sarcolemma

A
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8
Q

Sarcoplasmic reticulum

A
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9
Q

Thick filaments

A
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9
Q

Terminal cisternae

A
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10
Q

Thin filaments

A
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11
Q

Titin

A
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12
Q

Transverse tubules (T-tubule)

A
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13
Q

Tropomyosin

A
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14
Q

Cross-bridge cycle

A

sequence of events between binding of a cross-bridge to actin, its release, and reattachment during muscle contraction

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14
Q

Troponin

A
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15
Q

Contraction

A

operation of the force-generating process in a muscle

16
Q

Dihydropyridine (DHP) receptor

A

nonconducting calcium channels in the T-tubule membranes of skeletal muscle cells, which act as voltage sensors in excitation-contraction coupling

17
Q

End-plate potential (EPP)

A

depolarization of motor end plate of skeletal muscle fiber in response to acetylcholine; initiates action potential in muscle plasma membrane

18
Q

excitation -contraction coupling

A

in muscle fibers, mechanism linking plasma membrane stimulation with cross-bridge force generation

19
Q

Motor end plate

A
20
Q

Motor neurons

A
21
Q

Motor unit

A
22
Q

Neuromuscular junction

A
23
Q

Power stroke

A
24
Q

Relaxation

A
25
Q

Rigor mortis

A
26
Q

Ryanodine receptor

A
27
Q

Sliding-filament mechanism

A
28
Q

Eccentric contraction

A
28
Q

Concentric contraction

A

muscle activity that involves shortening of muscle length

29
Q

Fused tetanus

A
30
Q

Latent period

A
31
Q

Isometric contraction

A
32
Q

Isotonic contraction

A
33
Q

Load

A
34
Q

Optimal length (L0)

A
35
Q

Summation

A
36
Q

Tension

A
37
Q

Tetanus

A
38
Q

Twitch

A
39
Q

Unfused tetanus

A