Nerves of Steel

Question 1

The Functions of the
Nervous System

Answer 1

• The nervous system coordinates and controls body activity
• The nervous system detects and processes internal and external information and formulates appropriate responses

Question 2

•The two major divisions of the nervous system:

Answer 2

• Central Nervous System ( CNS)
• Peripheral Nervous System (PNS)

Question 3

The central nervous system (CNS) consists of the

Answer 3

Brain and Spinal cord

Question 4

The peripheral nervous system (PNS) consists of the

Answer 4

–cranial and spinal nerves, autonomic nervous system,
and ganglia

Question 5

The basic unit of the nervous system is the

Answer 5

neuron

Question 6

There are three types of neurons:

Answer 6

–sensory (also called afferent)

–associative

–motor (also called efferent)

Question 7

Parts of the Neuron

Answer 7

• cell body
• dendrites
• axon

Question 8

Dendrite function

Answer 8

carry impulses toward the cell body

Question 9

Axon function

Answer 9

carries impulses away from the cell body

Question 10

Neuroglia function

Answer 10

glial cells are the supportive cells of the nervous system

Question 11

Glial cells consist of

Answer 11

astrocytes

microglia

ependymal cells

oligodendrocytes

Schwann cells

Question 12

What is myelin?

Answer 12

a protective covering over some nerve cells including parts of the spinal cord

•serves as an electrical insulator

Question 13

Nerve Structure

Answer 13

•one or more bundles of impulse-carrying fibers that connect the CNS to other parts of the body

Question 14

What are the meninges

Answer 14

three-layered membrane that surrounds the CNS

Question 15

3 Layers of the meninges

Answer 15

the dura mater, arachnoid membrane, and the pia mater