The Nervous System

Question 1

Define- CNS

Answer 1

The central nervous system = brain and spinal cord

Question 2

Define- PNS

Answer 2

The peripheral nervous system = the nerves outside the CNS

Question 3

Reception

Answer 3

Detecting a stimulus

Question 4

Transmission

Answer 4

Movement of the impulse

Question 5

Integration

Answer 5

Impulses are sorted, processed and decisions made

Question 6

Response

Answer 6

A muscle or gland Carrie’s out the effect

Question 7

What is a neuron?

Answer 7

A nerve cell

Question 8

Sensory neurons (afferent)

Answer 8

Take messages to the CNS

Question 9

Motor neurons (efferent)

Answer 9

Take messages from the CNS

Question 10

Interneurons

Answer 10

Connect motor neurons and sensory neurons in the CNS

Question 11

Dendrites

Answer 11

Carry impulses to a cell body.

Question 12

Axons

Answer 12

Carry nerve impulses away from cell bodies

Question 13

Schwann cells

Answer 13

Make myelin

Question 14

Myelin

Answer 14

Insulates the electrical impulses

Question 15

The cell body

Answer 15

Forms neurotransmitters and the different parts of the neuron

Question 16

Define a synapse

Answer 16

A region where 2 neurons come into close contact.

Controls the direction of impulses.

Question 17

Define a synaptic cleft

Answer 17

A tiny gap between 2 neurons

Question 18

The brain:

Cerebrum

Answer 18

Controls voluntary muscles

Question 19

The brain:

Cerebellum

Answer 19

Controls balance

Question 20

The brain:

Medulla

Answer 20

Controls involuntary actions

Question 21

The brain:

Thalamus

Answer 21

Sends messages to different parts of the brain

Question 22

The brain:

Hypothalamus

Answer 22

Controls internal environment of the body

Question 23

What is Parkinson’s disease?

Answer 23

A nervous disorder caused by a lack of dopamine in the brain

Question 24

Results of Parkinson’s disease

Answer 24

Trembling limbs / rigid body

Question 25

How can Parkinson’s disease be prevented?

Answer 25

It can’t

Question 26

How can Parkinson’s disease be treated?

Answer 26

Physiotherapy and drugs

Question 27

The spinal cord

Answer 27

Carries impulses to and from the brain and controls many reflexes

Question 28

The peripheral nervous system

Answer 28

Mostly made of nerve fibres

Question 29

Define a reflex action

Answer 29

An automatic response to a stimulus

Question 30

What are reflex actions?

Answer 30

Fast responses that are designed to protect the body