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Anatomy > Muscle > Flashcards

Muscle Flashcards

0
Q

What is the sarcolemma?

A

Plasma membrane of muscle fiber

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1
Q

What is sacromere?

A

Smallest functional until of muscle fiber

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2
Q

What is the sarcoplasmic reticulum?

A

Tubular network around each myofibril

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3
Q

What is sarcoplasm?

A

Cytoplasm of muscle fiber

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4
Q

i band

A

Length of the actin filaments

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5
Q

Sarcolemma

A

Membrane surrounding muscle fibers

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6
Q

H band

A

Space between the ends of the actin filaments

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7
Q

Aponeuroses

A

Broad sheets attached to other muscles

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8
Q

Perimysium

A

Surrounding each muscle fascicle

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9
Q

Endomysium

A

Covers each muscle fiber

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10
Q

Creatine phosphate

A

Stores energy; regenerates ATP from ADP-P

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11
Q

Sliding filament theory

A

A myosin cross bridge attaches to an actin filament, and then the power stroke drags the 2 filaments past one another

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12
Q

Smooth muscle

A

Muscle in the digestive tract

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13
Q

Fast twitch fibers

A

High speed or power activities

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14
Q

Cross-bridge

A

Protruding part of the myosin filament. Includes myosin head which binds to an active site in an actin filament to produce a power stroke

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15
Q

Z line

A

Middle of the I band

16
Q

Vesicles

A

Store neurotransmitters

17
Q

Muscle tone

A

Continuous state of sustained contraction of motor units in a muscle

18
Q

Summation

A

The summing of all individual changed in a neuron’s membrane potential

19
Q

Transverse tubules

A

Allows nutrients to be transported and nerve impulses to be transmitted rapidly to individual myofibrils

20
Q

Action potential

A

A rapid and substantial depolarization of the membrane of a neuron of muscle cell that is conducted through the cell

21
Q

Isometric contraction(static)

A

Action in which a muscle contracts without moving, generating force while it’s length remains unchanged

22
Q

Threshold

A

Minimum level of stimulus to cause a contraction

23
Q

Tetanus

A

Highest tension developed by a muscle in response to stimulation of increasing frequency

Anatomy (16 decks)

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