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What is a motor unit? Briefly, explain how motor units functionin recruitment and in maintaining muscle tone. Describe thedifferent types of skeletal muscle fibers. Explain the type oftraining that could improve the performance of each type.

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Deanna Hettinger
Deanna HettingerLv2
28 Sep 2019

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Related questions

Describe the organization of a motor unit in vertebrate skeletal muscle, and explain how recruitment of motor units influences the amount of tension produced by a whole muscle.

In each of the following situations, indicate whether theproposed answers are true or false. In each case explain yourreasoning.

In an experiment, a physiologist was able to destroy some butnot all of the motor neurons to a specific skeletal muscle. Givenwhat you know about motor units, what is the result of thisaction?

T/F ?a.??There is no effect because motor neurons are redundant;multiple neurons innervate each muscle fiber as backup.

Explain:

T/F b. The muscle will, in general, contract more weakly becausefewer fibers are capable of contracting.

Explain:

T/F c. The ability of the muscle to contract will not changebecause the electrical potential will spread from stimulated fibersto adjacent fibers.

Explain:

In each of the following situations, indicate whether theproposed answers are true or false. In each case explain yourreasoning.

In an experiment, a physiologist was able to destroy some butnot all of the motor neurons to a specific skeletal muscle. Givenwhat you know about motor units, what is the result of thisaction?

T/F ?a.??There is no effect because motor neurons are redundant;multiple neurons innervate each muscle fiber as backup.

Explain:

T/F b. The muscle will, ingeneral, contract more weakly because fewer fibers are capable ofcontracting.

Explain:

T/F c. The ability ofthe muscle to contract will not change because the electricalpotential will spread from stimulated fibers to adjacentfibers.

Explain:

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