Organisation + function of NS

Question 1

What are the organs of the NS?

Answer 1

• brain
• spinal cord
• peripheral nerves
• sense organs

Question 2

What are the two divisions of the NS?

Answer 2

• CNS
• PNS

Question 3

CNS: involve what + function?

Answer 3

brain + spinal cord
- receiving info from parts of body (sensory data)
- processing info
- send signals (motor commands)

Question 4

PNS: involve what + function?

Answer 4

nerves + sense organs (eyes, ears, touch + pain receptors)
- connects NS with other systems
- delivers sensory info to CNS
- carry motor commands to peripheral tissues + effectors

Question 5

What are the two divisions of the PNS?

Answer 5

• afferent division
  Receptors: carry sensory signals to brain
• efferent division
  Effectors: carry motor signals from brain

Question 6

What does the afferent division consist of?

Answer 6

3 types of sensory neurons:
- somatic (skin, muscles, joints)
- visceral (internal organs)
- special (special senses)

Question 7

What does the efferent division consist of?

Answer 7

• somatic system (skeletal muscles)
• autonomic NS (smooth + cardiac muscles, glands)

Question 8

What are the two cell types the neural tissue made up of?

Answer 8

• neurones
  send & receive signals
• neuroglia (glial cells)
  support & protect neurons

Question 9

What two matters is the neural tissue made up of?

Answer 9

• grey matter (processing info)
  cell bodies, dendrites & unmyelinated neurones
• white matter (transmits signals)
  axons of myelinated neurones