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Flashcards in Quiz 9 Deck (25):
1

The axon is connected to the cell body at the

axon hillock

2

branches that may occur along the axon are called

Collaterals

3

axon terminate in a series of fine extensions known as

telodendria

4

Neurotransmitter for release is stored in synaptic

Vesicles

5

The axoplasm of an axon contains Which of the following

All of the above

6

most CNS neurons lack centrioles. This observation explains

Why CNS neurons cannot regenerate

7

Which of the following is not a recognized structural classification for neurons

pseudo polar

8

The most abundant class of neurons in the CNS is

Multi polar

9

Neurons in which dendritic and axonal are continuous and the soma lies off to one side are called

unipolar

10

Sensory neurons of the PNS are

Unipolar

11

in a ________ neuron, the dendrites and axon are continuous or fused

Unipolar

12

__________ are the most numerous type of neuron in the CNS

Interneurons

13

which of the following is not a function of the neuroglia

Memory

14

The glial cells in the CNS that form scar tissue after a CNS injury are called

Astrocytes

15

Small wandering cells that engulf cell debris and pathogens in the CNS are called

microglia

16

The myelin sheath that covers many CNS axons is formed by

oligodendrocytes

17

Functions of the astocytes include all of the following except

conducting action potentiala

18

Many medications introduced to the bloodstream cannot directly affect the neurons of the CNS because

The astrocytes isolate the CNS by forming a blood brain barrier

19

which of the following is a type of glial cell found in the PNS

Satellite cells

20

the neurilemma of axons in the PNS is formed by

Schwan cells

21

Deteriorating changes in the distal segment of an axon as a result of a break between it and the soma is called ______________ degeneration

wallerian

22

in the PNS Shwann cells participate in the in the repair of damaged nerves by

forming a cellular cord that directs axonal growth

23

Opening of sodium channels and the axon membrane causes

both depolarization and increased positive charge inside the membrane

24

any stimulus that opens ___________ Ion channel will produce graded potential

Any of the above

25

Puffer fish poison blocks voltage gated sodium channels like a cork. What effect with this neurotoxin have on the function of neurons

The axon would be on able to generate action potentials