Chapter 25 Sections 1-2

Question 1

Central Nervous System

Answer 1

The brain and the spinal cord.

Question 2

Pheripheral Neevous System

Answer 2

All of the parts of the nervous system except for 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 body.

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 or 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 the, 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.