The Nervous System

Question 1

What are the 2 main divisions of the nervous system

Answer 1

Central nervous system and the Peripheral Nervous System

Question 2

Central Nervous System (CNS)

Answer 2

• comprises of the brain and the spinal cord
• the role of the CNS is to integrate and co-ordinate all of the incoming neural information and to initiate neural messages which are then sent to the rest of the body

Question 3

The spinal cord …

Answer 3

• enables communication between the brain (CNS) and the rest of the body (PNS)

Question 4

Motor (efferent)

Answer 4

information from the brain (cns) to the the body (pns)

Question 5

Sensory (afferent)

Answer 5

information from the body (PNS) to the brain (CNS)

Question 6

Peripheral Nervous system (PNS)

Answer 6

• comprises of all nerves and neurones in the rest of the body including our muscles, organs and glands

Question 7

What are the 2 functions of the PNS

Answer 7

1) to communicate info from the bodes organs, muscles and glands to the CNS
2) To communicate info from the CNS to the bodes organs, muscles and glands

Question 8

What are the 2 divisions of the PNS

Answer 8

The somatic nervous system and the autonomic nervous system,

Question 9

Somatic nervous system

Answer 9

• Sometimes referred to as the skeletal / sensory nervous system,

Question 10

2 main functions of the somatic nervous system

Answer 10

1) VOLUNTARY movement of skeletal muscles
2) and has a sensory function, which involves receiving sensory information such as pressure and temperature and communication the to the CNS

Question 11

The Autonomic Nervous System (ANS)

Answer 11

Links the CNS to the bodes non-skeletal muscles (smooth and visceral) as well as internal organs and glands. It operates without voluntary control or conscious awareness, regulating our involuntary bodily functions necessary for survival such as HR, BR, sweat, Digestion

Question 12

What are the 2 divisions of the Autonomic Nervous System

Answer 12

The sympathetic and the parasympathetic nervous system

Question 13

The sympathetic nervous system

Answer 13

• The sympathetic nervous system is activated when arousal is increased, due to a perceived threat or in times of stress
• It prepares the body for action to either run away, fight the threat or remaining
• it increase bodily functions such as heart rate, breathing rate an decreases others such as digestion, bladder control etc

Question 14

what are the 2 main functions of the parasympathetic nervous system

Answer 14

Maintaining homeostasis or normal bodily functioning
e.g resting HR, BR, digestion etc

returning our body to astute of calm after a period of increased arousal
e.g Decreasing HR, BR

Question 15

The fight/flight response

Answer 15

is an innate, adaptive response that is critical for survival. With the involvement of the sympathetic NS, it increases arousal and prepares our body to deal with a situation that is perceived to be threatening or stressful