BIO 232 Contraction of Motor Units Worksheet PDF

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BIO 232 Contraction of Motor Units Worksheet...

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The Muscular System: Contraction of Motor Units 1.

Define a motor neuron:_______________________________________________ a single nerve cell that extends from the brain or __________________________________________________________________ spinal cord to a muscle or gland

2.

a motor neuron and all of the muscle cells it stimulates Define a motor unit: _________________________________________________

__________________________________________________________________ 3.

The synapse between a motor neuron and the muscle it innervates is called a __________________________. neuromuscular junction

4.

The stimulation of additional motor units will increase the strength of the contraction. This process is called _______________________. recruitment

5.

The muscles of the eye need to make precise small motor movements. Therefore, you would find (large or small) motor units in the eye.

small motor units

The muscles of the thigh exhibit gross movements for walking. Therefore, you would find (large or small) motor units in the thigh. 6.

large motor units

they are maintained by activities How is muscle tone maintained in the muscle? ___________________________

_________________________________________________________________ of the spinal cord and result in a firmness of the muscle If the nerve to a muscle is cut, what will happen to the muscle?_______________ the muscle will ________________________________________________________________ become flaccid 7.

What was the size of the motor units required in the arms and legs of the offensive player so that he could make the basket? (Quiz section) medium arms _________ large legs __________...