Protection of the CNS

Question 1

What are the three meninges layers?

Answer 1

Pia mater
Arachnoid mater
Dura mater

Question 2

What is the DURA MATER and what does it do?

Answer 2

Tough fibrous membrane

Adheres to the skull and spinal cord

Question 3

What is the ARACHNOID MATER and what does it do?

Answer 3

Fine cobweb-like threads, joined to the pai mater

Cobweb provides space for the cerebrospinal fluid

Question 4

What is the PIA MATER and what does it do?

Answer 4

Tissue paper thin innermost layer, CLOSE to the brain and spinal cord with lots of blood vessels
Provides blood brain barrier (BBB)
- only essential nutrients enter brain
- protects against pathogens

Question 5

What is CEREBROSPINAL FLUID, where is it found, and what does it do?

Answer 5

Clear colourless fluid formed in blood, containing glucose, proteins, urea, salts
Found between Pia + arachnoid mater and circulates the CNS
Carries nutrients to the CNS and acts as a shock absorber when CNS hit

Question 6

____ provides a hard casing for the _______ and _________

Answer 6

Bone, cranium, vertebrae

Question 7

Where does the spinal cord extend from?

Answer 7

Foramen magnum

Question 8

The spinal cord has ____ matter surrounded by _____ matter

Answer 8

Grey, white

Question 9

What is grey matter?

Answer 9

Unmyelinated fibres

Question 10

What is white matter?

Answer 10

Myelinated fibres