The Nervous System

Question 1

What is the function of the nervous system?

Answer 1

Our survival depends on us being sensitive to our surroundings. We need to be able to detect any changes and be able to respond to them.

Question 2

What are the 3 components of the nervous system?

Answer 2

Central Nervous System (CNS)
Peripheral Nervous System (PNS)
Senses

Question 3

Central Nervous System

Answer 3

CNS- controls everything (brain and spinal cord)

Question 4

Peripheral Nervous System

Answer 4

PNS- sends information from and to CNS
Cranial and spinal nerves

Question 5

Senses

Answer 5

Collect information about changes in the external or internal environment

Question 6

What are the 5 senses?

Answer 6

Sight
Hearing
Taste
Touch
Smell

Question 7

What is the stimulus for: sight

Answer 7

Light

Question 8

What is the stimulus for: hearing

Answer 8

Soundwaves
Vibration

Question 9

What is the stimulus for: taste

Answer 9

Chemical

Question 10

What is the stimulus for: touch

Answer 10

Temperature
Pressure
Pain receptor

Question 11

What is the stimulus for: smell

Answer 11

Chemical

Question 12

What is the sense organ for: sight

Answer 12

Eyes

Question 13

What is the sense organ for: hearing

Answer 13

Ears

Question 14

What is the sense organ for: taste

Answer 14

Tounge

Question 15

What is the sense organ for: touch

Answer 15

Skin

Question 16

What is the sense organ for: smell

Answer 16

Nose

Question 17

Name of nerve cells which make up the nervous system

Answer 17

Neurons

Question 18

3 types of neurons

Answer 18

Motor neuron
Sensory neuron
Interneuron

Question 19

Motor neuron

Answer 19

Carries impulses from the CNS to muscles or glands

Question 20

Sensory neuron

Answer 20

Carries impulses from the sense organs to the CNS

Question 21

Interneuron

Answer 21

Connects sensory neurons and motor neurons

Question 22

Dendrite

Answer 22

Recieve messages or impulses
Looks like branches

Question 23

Axon

Answer 23

Carries impulses
Looks like branch

Question 24

Axon terminal

Answer 24

Looks like branches with buds

Question 25

Cell body at the top

Answer 25

Motor neuron (looks like)

Question 26

Cell body in the middle

Answer 26

Interneuron (looks like)

Question 27

Cell body at the side

Answer 27

Sensory neuron (looks like)

Question 28

What is the brain protected by?

Answer 28

3 membranes -cerebrospinal fluid- spread shock, carry messages -skull (cranium)

Question 29

Cerebrum

Answer 29

-Centre of intelligence and allows us to think, reson and remember -processes information for the sensations of seeing, hearing, smelling,tasting and touching -controls emotions like fear,love and anger -controls voluntary movements of the muscles of the limbs, neck, tounge and eyes

Question 30

Cerebellum

Answer 30

-Coordinates movement of muscles during walking, running, playing etc -helps maintain balance of the body during standing, walking, running, playing

Question 31

Medulla oblongata

Answer 31

-brainstem connects the spinal cord with the brain - controls vital automatic activities like breathing, heartbeat and digestion -transmits impulses between the spinal cord and the rest of the brain

Question 32

Alzheimers disease

Answer 32

An irreversible, progressive brain disorder that slowly destroys memory and thinking skills and eventually the ability to carry out simple tasks

Question 33

Parkinson's disease

Answer 33

Progressive loss of muscle control, which leads to trembling

Question 34

Schizophrenia

Answer 34

Is a severe mental disorder that can result in hallucinations, delusions, and extremely disordered thinking and behavior

Question 35

Paraplegic

Answer 35

Paralysis in both lower limbs due to spinal injury or disease

Question 36

Alcohol

Answer 36

Slows does reflexes and coordination and affects judgement. Many people die in alcohol related car accidents

Question 37

Stimulants

Answer 37

Increase heart rate and breathing. E.g nicotine, coffee, tea, cola

Question 38

Cocaine

Answer 38

(Stimulant) causes the release of dopamine which produces feelings of pleasure

Question 39

Foetal Alcohol Syndrome (FAS)

Answer 39

Mental and physical abnormalities occur as a result of high levels of alcohol consumption by pregnant mothers