A&P 1- CHAPTER 12 QUIZ

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A person with polio has lost the use of his leg muscles. In which area of his spinal cord would you expect the virus-infected motor neurons to be? (Module 12.4B)

anterior gray horns

The anterior root of a spinal nerve contains

axons of motor neurons.

What is a reflex? (Module 12.1B)

A reflex is a rapid, automatic response triggered by specific stimuli.

During a withdrawal reflex of the foot, what happens to the limb on the side opposite the stimulus? What is this response called? (Module 12.14B)

The opposite side is extended. This is called the crossed extensor reflex.

Spinal nerves

contain both sensory and motor.

A(n) ________ reflex has at least one interneuron placed between the sensory and motor neurons.

polysynaptic

Cerebrospinal fluid flows within the

subarachnoid space.

All of the following are true of neural reflexes except that they

usually cannot be suppressed by the brain.


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