nervous system

Question 1

exam q: describe the function of the central and peripheral nervous systems (4 marks)

Answer 1

the function of the peripheral nervous system is to relay signals from the CNS to the rest of the body.
it also carries messages to the muscles.

the CNS coordinates messages from the peripheral NS and also coordinates reflexes.

Question 2

Describe how the nervous system reacts to stimuli (4 marks)

Answer 2

The message is received

It’s passed onto the sensory neurons

The brain/ CNS makes a decision

The response is stimulated

Question 3

Outline the role of the parasympathetic nervous system and the role of the sympathetic nervous system (4 marks)

Answer 3

Para- rest relaxes body systems (reduces heart rate)

Sym- increases rate of body systems (increases heart rate)

Question 4

Describe voluntary activities in the body (2 marks)

Answer 4

Actions are coordinated by the brain, including moving arms or legs.

Question 5

Describe involuntary activities in the body (2 marks)

Answer 5

Coordinated by the hindbrain, examples include reflexes or breathing rate

Question 6

Explain two symptoms of multiple sclerosis (4 marks)

Answer 6

Difficulty walking as messages do not get down the motor nerves

Vision problems as the optic nerve is affected