Chapter 4 - Nervous System

Question 1

What is the role of the nervous system?

Answer 1

To sense your surroundings and protect you from danger

Question 2

What is the CNS?

Answer 2

Central Nervous System - brain, spine

Question 3

What is the PNS?

Answer 3

Peripheral Nervous System - senses

Question 4

What is the order from stimulus to brain?

Answer 4

Stimulus –> receptor –> sensory neurone –> brain

Question 5

What types of energy are at each part?

Answer 5

Stimulus: light energy

Receptor: light energy to electrical energy

Sensory neurone: electrical energy

Brain: electrical energy

Question 6

What are the three types of neurones?

Answer 6

1. Sensory
2. Relay
3. Motor

Question 7

What is the job of the sensory neurone?

Answer 7

Carries impulses from receptors to spinal cord

Question 8

What is the job of the relay neurone?

Answer 8

Carries implies in the spinal cord

Question 9

What is the job of the motor neurone?

Answer 9

Carries impulses from spinal cord to effectors

Question 10

What does STORM stand for?

Answer 10

SENSORY to RELAY to MOTOR

Question 11

How does a synapse work?

Answer 11

1. An electrical impulses travels along an axon
2. This triggers the nerve ending of a neurone to release chemical messengers called neurotransmitters
3. These chemicals diffuse across the synapse (gap) and binds with receptor molecules on the membrane of the next neurone
4. The receptor molecules on the second neurone binds to the specific chemicals released from the first neurone
5. This stimulates the second neurone to transmit the electrical impulse