Meninges

Question 1

What are the three layers of the meninges?

Answer 1

Dura mater (outer), Arachnoid mater (middle), and Pia mater (inner).

Question 2

What is the function of the meninges?

Answer 2

To protect the brain and spinal cord from damage.

Question 3

What is the role of the dura mater?

Answer 3

Acts as a strong protective sheath around the brain and spinal cord.

Question 4

What structure filters CSF back into the bloodstream?

Answer 4

The arachnoid granulations.

Question 5

What is the pia mater responsible for?

Answer 5

Covering the brain and spinal cord closely, following all the folds, and containing blood vessels.

Question 6

Why can a lumbar puncture be performed safely in the lower lumbar region?

Answer 6

Because the spinal cord does not extend into this region, avoiding risk of damage.

Question 7

What is the function of the meninges?
A) Generating electrical impulses
B) Producing hormones
C) Protecting the brain and spinal cord
D) Regulating heart rate

Answer 7

C) Protecting the brain and spinal cord

Question 8

Which meningeal layer is the toughest and outermost?
A) Arachnoid mater
B) Dura mater
C) Pia mater
D) Choroid plexus

Answer 8

B) Dura mater

Question 9

What structure allows CSF to return to the bloodstream?
A) Subarachnoid space
B) Arachnoid granulations
C) Pia mater
D) Dura mater

Answer 9

B) Arachnoid granulations

Question 10

What is the subarachnoid space filled with?
A) Blood
B) Neurons
C) Cerebrospinal fluid (CSF)
D) Fat

Answer 10

C) Cerebrospinal fluid (CSF)

Question 11

The pia mater is the _______ layer of the meninges.
A) Thickest
B) Middle
C) Innermost
D) Hardest

Answer 11

C) Innermost

Question 12

Why does the arachnoid mater have its name?
A) It is the toughest meningeal layer
B) It has spider web-like trabeculae
C) It protects the spinal cord
D) It contains blood vessels

Answer 12

B) It has spider web-like trabeculae

Question 13

What makes the pia mater unique among the meningeal layers?
A) It forms a loose sac around the brain
B) It contains blood vessels that nourish the CNS
C) It does not touch the brain surface
D) It is the outermost layer

Answer 13

B) It contains blood vessels that nourish the CNS

Question 14

Why is a lumbar puncture performed in the lower lumbar region?
A) To prevent puncturing the spinal cord
B) Because the dura mater is absent there
C) It is the only place with CSF
D) It allows direct access to the brain

Answer 14

A) To prevent puncturing the spinal cord