Cells and tissues of the NS

Question 1

CNS consists of

Answer 1

brain and spinal cord

Question 2

PNS consists of

Answer 2

cranial and spinal nerves

Question 3

what are the two divisions of the PNS?

Answer 3

sensory (afferent) division

motor (efferent) division

Question 4

what are the two sections of the motor (efferent) division?

Answer 4

somatic motor

autonomic

Question 5

what are the two parts of the autonomic NS?

Answer 5

sympathetic

parasympathetic

Question 6

what are glial cells?

Answer 6

non-excitable supporting cells

Question 7

axons

Answer 7

conduct nerve impulses (APs) toward synaptic terminals

Question 8

myelin sheath

Answer 8

increases conduction speed in axons

Question 9

myelin sheath is formed by ……… …….. in the PNS

Answer 9

shwann cells

Question 10

myelin sheath is formed by ……….. in the CNS

Answer 10

oligodendrocytes

Question 11

depending on the presence of the myelin sheath - neurons will be ….

Answer 11

myelinated or non-myelinated neurons

Question 12

demyelination (the patchy scarring/loss of myelin sheath) is implicated in what disease?

Answer 12

multiple sclerosis

nerve conduction across the affected terminals is abnormal

Question 13

myelination in the PNS is by

Answer 13

schwann cells

Question 14

myelination in the CNS is by

Answer 14

oligodendrocytes

Question 15

what is the blood brain barrier?

Answer 15

protective barrier that helps maintain stable environment for the brain and prevents harmful AAs and ions in the bloodstream entering the brain

Question 16

what ventricles lie in the cerebral hemispheres?

Answer 16

lateral ventricles

Question 17

what ventricle lies in the diencephalon?

Answer 17

3rd ventricle

Question 18

where does the 4th ventricle lie?

Answer 18

hindbrain

between pons and medulla and cerebellum

Question 19

the subdural space is between which 2 layers?

Answer 19

dura

arachnoid

Question 20

what does the sub arachnoid space contain?

Answer 20

CSF

Question 21

the sub arachnoid space is between which 2 layers?

Answer 21

arachnoid

pia

Question 22

what order do the meningeal layers go in from spinal cord outwards?

Answer 22

P A D

pia, arachnoid, dura

Question 23

what lies in the ventricles in the brain and between the pia and arachnoid mater?

Answer 23

CSF