Chapter 7 - Nervous System

Question 1

Stimulus

Answer 1

Any change or signal in the environment tyrant 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

Where nerve impulses begin

Question 6

Axon

Answer 6

The long branchlike structure that picks up the impulses

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 to a motor neuron

Question 10

Motor neuron

Answer 10

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

Question 11

Synapse

Answer 11

Where a neuron transfers an impulse to another structure

Question 12

Central nervous system

Answer 12

Includes brain and spinal chord, acts as a traffic cop

Question 13

Peripheral nervous system

Answer 13

Includes all nerves outside of central nervous system, acts like car drivers

Question 14

Brain

Answer 14

The control center

Question 15

Spinal chord

Answer 15

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

Question 16

Cerebrum

Answer 16

Interprets input from senses, controls movement, and carries out remembering and learning

Question 17

Cerebellum

Answer 17

Coordinates muscle actions and helps keep balence

Question 18

Brain stem

Answer 18

Helps control breathing and heartbeat

Question 19

Somatic nervous system

Answer 19

Controls voluntary actions

Question 20

Autonomic nervous system

Answer 20

Controls involuntary actions

Question 21

Reflex

Answer 21

An automatic response that occurs rapidly without conscious control

Question 22

Concussion

Answer 22

Occurs when soft tissue of the brain is bruised as it collided against the skull.

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

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

Question 26

Retina

Answer 26

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

Question 27

Nearsightedness

Answer 27

See nearby objects clearly, but no distant objects

Question 28

Farsightedness

Answer 28

See distant objects clearly, but not close up

Question 29

Eardrum

Answer 29

A membrane that vibrates when sound waves strike it

Question 30

Cochlea

Answer 30

a snail shaped tube lined with sound receptor cells

Question 31

Tastebuds

Answer 31

Sensory receptors on your tounge