Muscle Flashcards

(33 cards)

1
Q

Dense regular type I collagen fibers blends into periosteum

A

Tendon

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2
Q

Muscle cell is

A

Multinucleated

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3
Q

Around muscle

A

Epimysium

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4
Q

Around fascicle

A

Perimysium

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5
Q

Around fiber

A

Endomysium

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6
Q

Cell membrane

A

Sarcolemma

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7
Q

Where calcium is stored in muscle cell

A

Sarcoplasmic reticulum

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8
Q

2 terminal cisterns + t-tubules =

A

Triad

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9
Q

Triad located at

A

A-I junction

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10
Q

Thin filaments held in place by

A

Z disc

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11
Q

From z-disc to z-disc

A

Sarcomere

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12
Q

Functional unit of contraction

A

Sarcomere

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13
Q

Consists of thick and thin filaments arranged in compartments Called sarcomeres

A

Myofibril

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14
Q

Covers actin in relaxed muscle

A

Tropomyosin

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15
Q

Thick filaments held in place by

A

M line

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16
Q

Protein that produces stretch and allows it to come back to normal state

17
Q

Filament does not change length but what decreases

18
Q

What kicks troop myosin off myosin binding site

19
Q

Neuron and muscular cell come together at

A

Neuromuscular junction

20
Q

Binds to receptors of cell membrane sets up muscle action potential

A

Acetylcholine

21
Q

Motor neuron and the number of skeletal muscle fibers its responsible for is

22
Q

Monitoring tension threaded around collagen fibers of tendon
Out in periphery getting info for CNS

A

Golgi tendon organ

23
Q

Fusiform shaped connective tissue capsule

A

Neuromuscular spindle

24
Q

Move bone when they contract

A

Extrafusal fibers

25
Extrafusal fibers innervated by
Alpha motor neuron
26
Mini skeletal muscle fibers in spindle | Monitors length of extrafusal fibers and how fast length changes
Intrafusal muscle fibers
27
Intrafusal muscle fibers innervated by
Gamma motor neuron
28
What initiates contraction in smooth muscle
Calcium binds to calmodulin
29
Varicosities release
Neurotransmitters
30
Hormones that acts on kidney cells
Atrial natriuretic factor
31
T-tubule + sarcoplasmic reticulum located at z-disc =
Diad
32
Glycolysis produces
Lactate
33
Thin myofilaments
Mostly actin