In Chapter 4 We Learned That the Peripheral Nervous System

question 80

Essay

In Chapter 4 we learned that the peripheral nervous system contains nerve fibers (bundles of axons and sometimes dendrites). Most of these nerves enter and leave the spinal cord, but the cranial nerves connect directly to the brain. Describe the role played by the cranial nerves that are involved in the senses of vision, hearing, and smell.

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Definitions:

Tetany

Intermittent tonic spasms resulting from inadequate parathyroid hormone.

Magnesium

A chemical element (Mg) that is a vital mineral for the human body, involved in over 300 biochemical reactions.

Phosphorus

A chemical element with the symbol P and atomic number 15, essential for life, used in fertilizers, and present in bones, DNA, and ATP.

Parathormone

A hormone produced by the parathyroid glands that helps regulate calcium levels in the blood.