NS. nervous system overview

Question 1

functions of the nervous system?
what cells are part of it?

Answer 1

communication
regulating internal events
information storage (memory)
sensations, perceptions, emotion

cells:
neurons (nerve cells) MORE
glia (glial cells) LESS

Question 2

functions of glial cells?

Answer 2

support and nutrition
myelin formation
- Schwann cells (PNS)
- oligodendrocytes (CNS)

Question 3

different glia cells - describe astrocytes?

Answer 3

involved in nutrient supply to neurons in CNS

Question 4

different glia cells - describe ependymal cells?

Answer 4

involved in production of cerebrospinal fluid? (CSF)

Question 5

different glia cells - describe Schwann cells?

Answer 5

neuronal support and myelin formation in PNS

Question 6

different glia cells - describe oligodendrocytes?

Answer 6

neuronal support and myelin formation in CNS

Question 7

different glia cells - describe microglia?

Answer 7

defence role
phagocytic

Question 8

what are neurons?

Answer 8

excitable cells
generate and transport signals
synaptic processing (memory)
structure related to function

Question 9

describe the organisation of the nervous system?

Answer 9

peripheral nervous system
- spinal nerves
- cranial nerves

central nervous system
- spinal chord
- brain

Question 10

describe the term afferent?

Answer 10

nerves going towards CNS

Question 11

describe the term efferent?

Answer 11

nerves leaving CNS to peripheral

Question 12

describe the term visceral?

Answer 12

anything you are not aware of

Question 13

describe the term somatic?

Answer 13

things we are conscious of

Question 14

describe the term visceral efferents?

Answer 14

autonomic nervous system

Question 15

how many groups of spinal nerves are there?

Answer 15

31

Question 16

describe the pairs of spinal nerves?

Answer 16

8 cervical
12 thoracic
5 lumbar
5 sacral
1 coccygeal

Question 17

what do axons do in sensory neurones

Answer 17

supply structures on the body surface called dermatomes