Quiz 9 - CNS: last bit of brain

Question 1

protection of the brain

Answer 1

brain is protected by bone, meninges and cerebrospinal fluid and the blood-brain barrier

Question 2

mengiees

Answer 2

3 connective tissue membranes external to the CNS to cover and protect the CNS

• dura mater
• arachnoid
• pia mater

Question 3

dura mater

Answer 3

“tough mother”; composed of 2 fibrous connective tissue layers

Question 4

arachnoid

Answer 4

“spider”; beneath is subarachnoid space filled with CSF and large blood vessels - will protrude superiorly and allow CSF to be absorbed into venous blood

Question 5

pia mater

Answer 5

“gentle mother”; delicate connective tissue that clings tightly to the brain

Question 6

ventricles and cerebrospinal fluid

Answer 6

cavities of the brain filled with CSF contain choroid plexuses that produce CSF

Question 7

ventricles

Answer 7

lateral - paired c-shaped
third - in diencephalon
forth - dorsal to pons

Question 8

CSF

Answer 8

completely surrounds the exposed surfaces of the central nervous system

Question 9

what does CSF do

Answer 9

• prevents contact between delicate neural surfaces
• support brain: forms a lipid cushion to give buoyancy to the CNS organs
• transport nutrients, chemical messengers and waste products

Question 10

choroid plexus

Answer 10

produces CSF - also removes waste from CSF and fine-tunes its composition