U3: 17- Divisions Of The Nervous System And Neural Pathways

Question 1

Name the two divisions of the nervous system.

Answer 1

• central nervous system (CNS)

* peripheral nervous system (PNS)

Question 2

Which two components make up the central nervous system (CNS)?

Answer 2

Brain and spinal cord

Question 3

Name the nerves that carry nerve impulses from the receptors in the body towards the CNS.

Answer 3

Sensory neurons

Question 4

Name the set of nerves that carry nerve impulses away from the CNS towards the effectors (e.g. muscles and glands).

Answer 4

Motor neurons

Question 5

Name the two branches of the peripheral nervous system (PNS).

Answer 5

• somatic nervous system

* autonomic nervous system

Question 6

Out of the somatic nervous system and the autonomic nervous system which one controls voluntary movements?

Answer 6

Somatic nervous system

Question 7

Out of the somatic nervous system and the autonomic nervous system which one controls involuntary movements without the person’s control being involved?

Answer 7

Autonomic nervous system

Question 8

What are the names of the two sets of nerves that make up the autonomic nervous system that prepare the body for action and returns it to normal after the action is over?

Answer 8

• sympathetic nerves

* parasympathetic nerves

Question 9

What word is used to describe the fact that the sympathetic nerves and parasympathetic nerves exert opposite effects?

Answer 9

Antagonistic

Question 10

Describe what the sympathetic nerves do to the heart rate, breathing rate, rate of digestion and secretion of adrenaline to prepare the body for action.

Answer 10

They all increase apart from the rate of digestion which decreases

Question 11

Describe what the parasympathetic nerves do to the heart rate, breathing rate and rate of digestion.

Answer 11

They all decrease apart from the rate of digestion which increases

Question 12

Which organ does not have a parasympathetic nerve going to it despite having a sympathetic nerve going to it?

Answer 12

Adrenal glands

Question 13

How does the secretion of adrenaline get stopped?

Answer 13

The sympathetic nerves stop stimulating the adrenal glands and levels of adrenaline gradually decrease

Question 14

What term is used to describe the action that the body performs after stimulation by the sympathetic nerves?

Answer 14

Fight or flight response

Question 15

What term is used to describe the action that the body performs after stimulation by the parasympathetic nerves?

Answer 15

Rest and digest response