Chapter 25 Vocab Section 1 and 2

Question 1

Peripheral Nervous System (PNS)

Answer 1

All of the parts of the nervous system except for the brain and the spinal cord.

Question 2

Neuron

Answer 2

A nerve cell that is specialized to receive and conduct electrical impulses.

Question 3

Nerve

Answer 3

A collection of axons through which impulses travel between the central nervous system and other parts of the body.

Question 4

Brain

Answer 4

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

Question 5

Integumentary System

Answer 5

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

Question 6

Reflex

Answer 6

An involuntary and almost immediate movement in response to a stimulus.

Question 7

Feedback Mechanism

Answer 7

A cycle of events in which information from one step controls or affects a previous step.

Question 8

Retina

Answer 8

The light sensitive inner layer of the eye.

Question 9

Cochlea

Answer 9

A coiled tube that is found in the inner ear that is essential to hearing.

Question 10

Central Nervous System (CNS)

Answer 10

The brain and the spinal cord.