Chapter 25; 10 Words

Question 1

Central Nervous System (CNS)

Answer 1

• the brain and the spinal cord

Question 2

Peripheral Nervous System (PNS)

Answer 2

• all of the parts of the nervous system except the brain and the spinal cord

Question 3

Neuron

Answer 3

• a nerve cell that is specialized to receive and conduct electrical impulses

Question 4

Nerve

Answer 4

• a collection of nerve fibers (axons) through which impulses travel between the central nervous system and Other parts of the vody

Question 5

Brain

Answer 5

• the mass of nerve tissue that is the main control center of the nervous system

Question 6

Integumentary System

Answer 6

• the organ system that forms a protective covering on the outside of the body

Question 7

Reflex

Answer 7

• an involuntary and almost immediate movement in response to a stimulus

Question 8

Feedback Mechanism

Answer 8

• a cycle of events in which information from one step controls of affects a previous step

Question 9

Retina

Answer 9

• the light-sensitive inner layer of the eye; it receives images formed by the lens and transmits them through the optic nerve to the brain

Question 10

Cochlea

Answer 10

• a coiled tube that is found in the inner ear and that is essential to hearing