Lecture 19: The Central Nervous System Flashcards

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1
Q

What is gray matter made up of?

A

Soma, Dendrites, Unmeymlinated Axons

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2
Q

What is white matter made up of?

A

Myelinated axons

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3
Q

What is the outermost layer of protection for the brain?

A

Cranium

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4
Q

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

A

Vetebrae

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5
Q

What is the intermediate layer of protection for the brain?

A

Meninges

Epidural Space, Dura mater, Arachnoid membrane, Pia Mater

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6
Q

What is the inner layer of protection for the brain?

A

Extracellular Fluid

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

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7
Q

How does ESF protect the brain?

A

Buoyancy, Impact absorption, Chemical protection

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8
Q

Why are capillaries in the brain highly selective?

A

Tight Junctions

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9
Q

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

A

Hypothalamus, Medulla Oblongata

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10
Q

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

A

15%

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11
Q

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

A

20%

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12
Q

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

A

Glucose

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13
Q

What are the four regions of the spinal cord?

A

Cervical, thoracic, lumbar, sacral

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