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exercise physiology final > skeletal muscle > Flashcards

skeletal muscle Flashcards

1
Q

skeletal muscle

A

voluntary, striated

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2
Q

smooth

A

involuntary, hollow organs

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3
Q

cardiac

A

involuntary, heart only

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4
Q

1st important role of of skeletal muscle

A

generation for movement/breathing

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5
Q

2nd important role of of skeletal muscle

A

generation for postural support

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6
Q

3rd important role of of skeletal muscle

A

heat production during cold stress

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7
Q

4th important role of of skeletal muscle

A

venous return

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8
Q

skeletal muscle is attached to bone by?

A

tendon

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9
Q

the entire muscle is surrounded by

A

epimysium

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10
Q

surrounded by perimysium

A

fasciculi

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11
Q

fasciculi

A

made of individual muscle cells

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12
Q

the muscle fiber is surrounded by

A

endomysium

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13
Q

endomysium

A

made of myofibrils divided into sarcomeres , multinucleated

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14
Q

Role of Calcium in Muscle Fiber

A

Calcium plays a crucial role in initiating muscle contraction by binding to troponin, which exposes the actin-binding sites on the thin filaments.
The release of calcium ions from the sarcoplasmic reticulum triggers the sliding of actin and myosin filaments, leading to muscle contraction

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15
Q

what key players are involved in excitation-contraction coupling

A

Calcium ions play a crucial role in excitation-contraction coupling by binding to troponin, which leads to the exposure of active sites on actin filaments.
Troponin, tropomyosin, and myosin are essential proteins involved in the regulation of muscle contraction.

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16
Q

How does excitation-contraction coupling work?

A

is the process by which an action potential triggers muscle contraction.
It involves the transmission of the action potential along the sarcolemma and into the muscle fiber via the T-tubules.

17
Q

3 thin filaments

A

actin, troponin, tropomyosin

18
Q

thin to thick ratio

A

3:1

exercise physiology final (1 decks)

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