Nervous system functioning (U3 AOS 1)

Question 1

Where does the spinal reflex occur?

Answer 1

Occurs in the spinal cord and is independent of the brain

Question 2

What are the 3 neurons associated with the spinal reflex?

Answer 2

Interneurons, sensory neurons and motor neurons

Question 3

What are the roles of each of the neurons?

Answer 3

Sensory: bring signals to the CNS
Motor: bring signals out of the CNS to the rest of the body
Inter: connect the spinal motor and sensory neurons and conveys signals between them

Question 4

What type of movements are the autonomic and somatic nervous systems responsible for?

Answer 4

Autonomic ns is responsible for involuntary movements and the somatic ns is responsible for voluntary movements.

Question 5

What are the roles of the CNS and PNS

Answer 5

The CNS transmits and receives messages to and from the PNS.

The PNS carries messages to and from the CNS.

Question 6

What are the divisions of the autonomic nervous system? Brief description of each.

Answer 6

There is the sympathetic nervous system and parasympathetic nervous system.
SNS: prepares body for action by immediately increases the activity of visceral muscles, organs and glands at times of stress, threat or vigorous activity.
PNS: calms body down after action by gradually decreasing the activity of visceral muscles, organs and glands once threat is gone. Aims to bring body back to homeostasis.

Question 7

What is homeostasis?

Answer 7

A balanced state of the body.