Ch 14 Protection

Question 1

How is the brain protected?

Answer 1

Skull, meninges, cerebrospinal fluid, blood brain barrier

Question 2

3 meningeal layers of the brain

Answer 2

Dura mater, arachnoid mater, pia mater

Question 3

Two layers of the dura mater

Answer 3

periosteal layer, meningeal layer

Question 4

What does the periosteal layer of the dura mater touch?

Answer 4

outer layer; lines the cranial bones

Question 5

What does the meningeal layer of the dura mater touch?

Answer 5

inner layer; lines the arachnoid mater

Question 6

Pia mater function

Answer 6

covers blood vessels of central nervous system

Question 7

Arachnoid villi definition

Answer 7

• located in the arachnoid mater
• extends into the sinus and reabsorbs cerebrospinal fluid into bloodstream

Question 8

3 dural folds

Answer 8

Falx cerebri, falx cerebelli, tentorium cerebelli

Question 9

Falx cerebri

Answer 9

separates right and left cerebral hemispheres of the brain

Question 10

Falx cerebelli

Answer 10

separates the right and left cerebellar hemispheres

Question 11

Tentorium cerebelli

Answer 11

separates the cerebellum and cerebrum

Question 12

Ventricle definition

Answer 12

internal chamber in the brain filled with cerebrospinal fluid

Question 13

What do ventricles contain

Answer 13

cerebrospinal fluid

Question 14

How many ventricles are there?

Answer 14

4; 2 lateral, third and fourth

Question 15

What type of neuroglia line the ventricles and monitor the cerebrospinal fluid?

Answer 15

ependymal cells

Question 16

Ependyma definition

Answer 16

type of neuroglia that lines ventricles and covers choroid plexus

Question 17

Ependymal cells function

Answer 17

modify the filtrate

Question 18

Function of cerebrospinal fluid

Answer 18

physical protection, chemical protection, circulation

Question 19

Where is cerebrospinal fluid produced

Answer 19

choroid plexus

Question 20

What is the choroid plexus

Answer 20

spongy mass of blood capillaries on the floor of each ventricle

Question 21

How is cerebrospinal fluid produced

Question 22

Flow of production and return of cerebrospinal fluid

Answer 22

1. CSF secreted by choroid plexus
2. CSF flows through interventricular foramen into third ventricle
3. choroid plexus in third ventricle adds more CSF
4. CSF flows down cerebral aqueduct to fourth ventricle
5. choroid plexus in fourth ventricle adds more CSF
6. CSF flows out two lateral apertures and one median aperture
7. CSF fills subarachnoid space and bathes external surfaces of brain and spinal cord
8. arachnoid villi reabsorbs CSF into bloodstream

Question 23

What are meninges

Answer 23

protective membranes the envelope the brain

Question 24

Meningitis definition

Answer 24

inflammation of the meninges