Lecture 19: The Central Nervous System

Question 1

What is gray matter made up of?

Answer 1

Soma, Dendrites, Unmeymlinated Axons

Question 2

What is white matter made up of?

Answer 2

Myelinated axons

Question 3

What is the outermost layer of protection for the brain?

Answer 3

Cranium

Question 4

What is the outermost layer of protection for the spinal cord?

Answer 4

Vetebrae

Question 5

What is the intermediate layer of protection for the brain?

Answer 5

Meninges

Epidural Space, Dura mater, Arachnoid membrane, Pia Mater

Question 6

What is the inner layer of protection for the brain?

Answer 6

Extracellular Fluid

ISF: Within Pia Mater, CSF: Ventricles and subarachnoid space

Question 7

How does ESF protect the brain?

Answer 7

Buoyancy, Impact absorption, Chemical protection

Question 8

Why are capillaries in the brain highly selective?

Answer 8

Tight Junctions

Question 9

Which two brain blood vessels do not have blood-brain barrier?

Answer 9

Hypothalamus, Medulla Oblongata

Question 10

What percentage of blood from the heart go to the brain?

Answer 10

15%

Question 11

What percentage of oxygen in the body go to the brain?

Answer 11

20%

Question 12

What is the only thing that the brain “eats”?

Answer 12

Glucose

Question 13

What are the four regions of the spinal cord?

Answer 13

Cervical, thoracic, lumbar, sacral