The Nervous System

Question 1

What are the divisions of the nervous system?

Answer 1

CNS - brain and spinal cord

PNS - somatic and autonomic (sympathetic and parasympathetic)

Question 2

What is the CNS responsible for?

Answer 2

• important physiological processes: breathing, heartbeat and info from the sense
• initiating and controlling behaviour

Question 3

What is the brain responsible for?

Answer 3

Information processor

Coordination and behaviour

Question 4

How is the brain divided?

Answer 4

Cerebrum has 2 hemispheres and 4 lobes
Connected by the corpus callosum
Cerebellum underneath the cerebrum
Brain stem connects the brain and spinal cord

Question 5

What are the functions of the cerebrum

Answer 5

Different lobes = different functions

Frontal, parietal, occipital and temporal

Question 6

What are the functions of the cerebellum

Answer 6

Motor skills and balance
Coordinating muscles
Precise controlled movement

Question 7

What is the function of the brain stem

Answer 7

Motor and sensory neurone transmit into through the brain stem to brain
Automatic functions like breathing, heartbeat, swallowing

Question 8

What is the function of the spinal cord?

Answer 8

Transmits info between brain and test of the body. Controls and regulates activities in the body.
Connects with different organs, glands and muscles.
Enables simple reflex actions without the brain

Question 9

What is the PNS responsible for?

Answer 9

Communicating info between CNS and areas outside the brain.

Question 10

What is the function of the somatic nervous system?

Answer 10

Controls voluntary muscles
Communicates w muscles and gets sensory info from skin
Made of cranial nerves from underside of brain and spinal nerves which have motor and sensory neutrons
Reflex actions

Question 11

What is the function of the autonomic nervous system?

Answer 11

Involuntary body functions 
Not consciously aware
Heart beat, digestion etc
Stress response
sympathetic and parasympathetic NS

Question 12

What is the function of the sympathetic nervous system?

Answer 12

Allows the body to deal w threats
Fight or flight 
Increases heart rate
Increases blood pressure
Neurons communicate w glands and organs
Pupils dilate
Airways relax
Inhibits digestion and urination
Release of stored energy

Question 13

What is the function of the parasympathetic nervous system?

Answer 13

Counters reaction of SNS
Heart rate and BP decrease
Digestion and grime resume
Pupils and airways construct