Exam 2 Part 9

Question 1

4 neuroglia in CNS

Answer 1

astrocytes
ependymal cells
Microglia
oligodendrocytes

Question 2

2 neuroglia PNS

Answer 2

satellite cells

neurolemmocytes

Question 3

astrocytes

Answer 3

in CNS. largest, most abundant glial cell; part of blood-brain barrier
regulation, structural support
parivascular feet

Question 4

ependymal cells

Answer 4

in CNS. line ventricles of brain and central canal of spinal column; involved in secretion of cerebrospinal fluid

Question 5

microglia

Answer 5

in CNS. least common, smallest. number increases with infections, wander tissues, phagocytic

Question 6

oligodendrocytes

Answer 6

in CNS. all extentions repeatedly wrap around multiple axons - protective covering = myelin sheath

Question 7

satellite cells

Answer 7

in PNS. nourish, support, and separate neuron cell bodies in ganglia

Question 8

Nuerolemmocytes

Answer 8

in PNS. cells whose plasma membranes form covering around axons of PNS; usually myelinated and thus forms myelin sheath
100-1000s needed to myelinate entire axon

Question 9

myelin

Answer 9

insultation. white lipid protein within plasma membrane; speeds up conduction

Question 10

Gaps in myelin sheath

Answer 10

nuerofibril nodes (nodes of Ranvier)

Question 11

synapse

Answer 11

junction where nerve impulse transmitted 
between axon terminal of 1 neuron and:
-neuron
-gland
-effector

Question 12

nerve

Answer 12

collection of axons within PNS

axon and associated blood vessels held together by CT

Question 13

endoneurium

Answer 13

CT around each nerve fiber

Question 14

perineurium

Answer 14

CT surrounding groups of nerve fibers to fasicles

Question 15

epineurium

Answer 15

surrounds many fasicles to form nerve

Question 16

mixed nerves

Answer 16

both sensory and motor neurons

most spinal nerves

Question 17

sensory nerves

Answer 17

sensory neurons only

cranial nerves

Question 18

motor nerves

Answer 18

motor neurons onlys

cranial nerves