Structure/Function Relationshipsin the Nervous System

Question 1

Name the 4 types of CNS nueroglia?

Answer 1

Astrocytes (protoplasmic and fibrous)
Oligodendrocytes
Microglia
Epindymal cells

Question 2

What are the four key functions of the astrocytes?

Answer 2

Provide support
Maintain blood-brain-barrier
In embryology they regulate growth, migration and interconnections of neurones
Maintain environment in generation of nerve impulses

Question 3

What are the functions of oligodendrocytes?

Answer 3

Myelin sheath formation of CNS

Question 4

What are the functions of microglia?

Answer 4

Removal of cellular debris

Question 5

What are the functions of epindymal cells?

Answer 5

Assist the circulation of CSF

Question 6

Name the PNS neuroglia?

Answer 6

Schwann cells`

Question 7

Name a type of commisural fibre?

Answer 7

Corpus callosum

Question 8

Name a type of association fibre?

Answer 8

Superior longitudinal fasiculus (connects Broca’s and Wernicke’s area)

Question 9

Name a type of efferent brain fibre?

Answer 9

Internal capsule (fibres from the cortex to the pons and medulla)

Question 10

Name the six layers of the cortex?

Answer 10

Molecular layer
Outer granular layer
Outer pyramidal layer
Inner granular layer - Major input zone from external stimulus
Inner pyramidal layer - Major output zone
Multiform layer

Question 11

Agranular is said to be associated to?

Answer 11

Motor cortex

Question 12

Hypergranular is said to be associated to?

Answer 12

Sensory cortex

Question 13

If there is a wide layer 4 and thin layer 5, what type of cortex is this?

Answer 13

Sensory