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Histology > Muscle > Flashcards

Muscle Flashcards

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

A

Motor neuron

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
Q

Extrafusal fibers innervated by

A

Alpha motor neuron

26
Q

Mini skeletal muscle fibers in spindle

Monitors length of extrafusal fibers and how fast length changes

A

Intrafusal muscle fibers

27
Q

Intrafusal muscle fibers innervated by

A

Gamma motor neuron

28
Q

What initiates contraction in smooth muscle

A

Calcium binds to calmodulin

29
Q

Varicosities release

A

Neurotransmitters

30
Q

Hormones that acts on kidney cells

A

Atrial natriuretic factor

31
Q

T-tubule + sarcoplasmic reticulum located at z-disc =

32
Q

Glycolysis produces

33
Q

Thin myofilaments

A

Mostly actin

Histology (8 decks)

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