Divisions Of The Nervous System

Question 1

What is the human nervous system?

Answer 1

Body wide system of nerve cells that collects information from the world, processes this informatiom and then takes action by directing body organs and muscles via the trnasmission of electro chemical messages

Question 2

What are the Central Nervous Systems? (CNS)

Answer 2

• Complex processing

• The brain & Spinal cord

Question 3

What does the brain do?

Answer 3

All conscious and most unconscious processing

Question 4

What does the spinal cord do?

Answer 4

Recieves and transmits information, some reflex processing

Question 5

What is the Peripheral nervous system? (PNS)

Answer 5

Body wide network of messenger neurons

Sensory neurons and motor neurons

Contains ANS and SNS

Question 6

What do sensory neurons do?

Answer 6

Afferent - Carry sensory information towards the CNS

Question 7

What do motor neurons do?

Answer 7

Efferent - Carry motor information away from the CNS

Question 8

What is the Somatic Nervous System? (SNS)

Answer 8

Controls skeletal muscles for movement

Voluntary system- under conscious control

Question 9

What is the autonomic nervous system? (ANS)

Answer 9

Controls actions of internal organs and glands

Involuntary system (not under conscious control)

Question 10

What are the 2 branches of the ANS?

Answer 10

Sympathetic and Parasympathetic

Question 11

What is the Sympathetic branch of the ANS?

Answer 11

Increases bodily activities

Releases noradrenaline

Activates in stress response (Fight or Flight)

Question 12

What bodily activities does the sympathetic branch of the ANS cause?

Answer 12

Heart rate increase
Sweat increase
Breathing rate increase
Dilates pupils
Inhibits digestion

Question 13

What is the parasympathetic branch of the ANS?

Answer 13

Decreases bodily activities

Release of acetylcholine

Activated in rest (rest and digest)

Question 14

What bodily activities does the parasympathetic branch of the ANS do?

Answer 14

Heart rate decrease
Sweat decrease
Breathing rate decrease
Constricts pupils
Stimulates digestion

Question 15

What does the sympathetic branch of the ANS release?

Answer 15

Noradrenaline

Question 16

What does the paradympathetic branch of the ANS release?

Answer 16

Acetylcholine

Question 17

What is homeostasis?

Answer 17

Regulation of the internal environment

A balance between sympathetic and parasympathetic systems maintains homeostasis