Book 3

Question 1

Stimulus

Answer 1

Any change or signal isn’t eh environment that an organism can recognize and react to

Question 2

Response

Answer 2

A reaction to a stimulus

Question 3

Neurons

Answer 3

Cells that carry information through your nervous system

Question 4

Nerve impulse

Answer 4

The message that a neuron carries

Question 5

Dendrite

Answer 5

Branchlike structure that picks up impulses

Question 6

Axon

Answer 6

A long structure leading away from the cell body (impulses move through the axon)

Question 7

Nerve

Answer 7

A bundle of nerve fibers

Question 8

Sensory neuron

Answer 8

Picks up a stimulus and converts it into a nerve impulse

Question 9

Interneuron

Answer 9

Carries a nerve impulse to another interneuron or motor neuron

Question 10

Motor neuron

Answer 10

Send an impulse to a muscle or gland, enabling it to respond

Question 11

Synapse

Answer 11

The place where a neuron transfers an impulse to another structure

Question 12

Central nervous system

Answer 12

Includes the brain and spinal cord and acts like a traffic cop

Question 13

Peripheral nervous system

Answer 13

Includes all nerves outside of the central nervous system

Question 14

Brain

Answer 14

Control center of the nervous system

Question 15

Spinal cord

Answer 15

A thick column of nervous tissue that links that brain to the peripheral nervous system

Question 16

Cerebrum

Answer 16

Interprets input from your senses, controls movement, and carries out complex mental processes such as learning and remembering

Question 17

Brain stem

Answer 17

Controls your body’s involuntary actions

Question 18

Cerebrum

Answer 18

Interprets input from your senses, controls movement, and carries out complex mental processes such as learning and remembering

Question 19

Cerebellum

Answer 19

Coordinates your muscle actions and helps you keep your balance

Question 20

Somatic nervous system

Answer 20

Controls voluntary actions.

Question 21

Autonomic nervous system

Answer 21

Controls involuntary actions

Question 22

Reflex

Answer 22

An automatic response that occurs rapidly without conscious control

Question 23

Cornea

Answer 23

The clear tissue that covers the front of the eye

Question 24

Pupil

Answer 24

The opening through which light enters the eye

Question 25

Iris

Answer 25

A circular structure that surrounds the pupil and regulates how much light enters the eye

Question 26

Lens

Answer 26

A flexible structure that focuses light

Question 27

Retina

Answer 27

Lines the back of the eye and contains light-sensitive cells

Question 28

Nearsightedness

Answer 28

See nearby objects clearly but not distant objects

Question 29

Farsightedness

Answer 29

See distant objects clearly, but not nearby objects

Question 30

Eardrum

Answer 30

A membrane that vibrates when sound waves strike it

Question 31

Cochlea

Answer 31

A snail-shaped tube lined with sound receptor cells

Question 32

Semicircular canals

Answer 32

Things that help your central nervous system maintain your balance

Question 33

Tastebuds

Answer 33

Sensory receptors on your tongue