nervous system

Question 1

what is the function of the nervous system?

Answer 1

to receive stimuli from the external and internal environment

Question 2

what are the three different nervous systems?

Answer 2

• central nervous system (CNS)
• peripheral nervous system (PNS)
• parasympathetic and sympathetic autonomic nervous system (ANS)

Question 3

what does the CNS mainly do?

Answer 3

control intelligence

Question 4

what does the PNS mainly do?

Answer 4

gives information about the external environment

Question 5

what does the parasympathetic ANS mainly do?

Answer 5

maintain homeostasis

Question 6

what does the sympathetic ANS mainly do?

Answer 6

control the body’s “fight or flight”

Question 7

what are the 3 main neurons?

Answer 7

• sensory neurons
• relay neurons
• motor neurons

Question 8

what is the function of a sensory neuron?

Answer 8

carries signals from sense organs to the CNS

Question 9

what is the function of a relay neuron?

Answer 9

carries messages from one part of the CNS to another

Question 10

what is the function of a motor neuron?

Answer 10

carries signals from the CNS to the muscles and other effector organs

Question 11

what is a synapse?

Answer 11

the point of contact between neurons

Question 12

what is a reflex arc?

Answer 12

• the nerve pathway involved in reflex actions
• usually a sensory and motor neuron connected by a synapse