Neuromuscular System Flashcards

1
Q

All-or-none Principle

A

A stronger action potential cannot produce a stronger contraction.

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2
Q

Tetanus

A

The maximal amount of force the motor unit can develop.

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3
Q

Slow-twitch; high fatigue resistance and aerobic capacity; low force production.

A

Type I Muscle Fibers

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4
Q

Fast-twitch; lower fatigue resistance and aerobic capacity; intermediate to high force production.

A

Type II Muscle Fibers

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5
Q

Motor Units are composed of… that…

A

muscle fibers with specific morphological and physiological characteristics … determine their functional capacity.

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6
Q

What 2 factors determine force output of a muscle?

A

Frequency of activation of individual motor units OR the number of motor units activated.

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7
Q

Proprioceptors

A

Specialized sensory receptors located within joints, muscles, and tendons.

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8
Q

What do proprioceptors do?

A

Provide the central nervous system with information needed to maintain muscle tone and perform complex coordinated movements.

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9
Q

Muscle spindles

A

Proprioceptors that consist of several modified muscle fibers enclosed in a sheath of connective tissue.

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10
Q

What are Golgi Tendon Organs (GTO’s) & where are they located?

A

Proprioceptors located in tendons.

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11
Q

What do GTO’s do?

A

Inhibit muscle activation to protect against the development of excessive tension.

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