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Flashcards in Neurohistology Deck (22)
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1

the nervous system is divided into two parts. ___ and ___

CNS
PNS

2

Cell body containing the nucleus

Perikaryon

3

Sensory; highly branched tapering processes which either end in specialized sensory receptors or form synapses with neighboring neurones

Dendrites

4

Motor; cylindrical process terminating on other neurones or effector organs by way of smaller branches / swellings called as terminal boutons

Axon

5

T or F:
The cytoplasm of the cell body contains large aggregations of Rough endoplasmic reticulum–NISSL’s substancewhich extends into the dendrites

T

6

Numerous dendrites project from the cell body

Multipolar

7

Only a single dendrite which arises from the pole of the cell body opposite to the origin of the axon

Bipolar

8

A single dendrite and axon arise from a common stem of the cell body

Pseudounipolar

9

T or F
All SENSORY neurons and association neurons are Multipolar

F
All MOTOR neurons and association neurons are Multipolar

10

T or F All MOTOR neurons are Pseudounipolar Except MOTOR neurons of special senses classified as Bipolar

F
All SENSORY neurons are Pseudounipolar Except SENSORY neurons of special senses classified as Bipolar

11

Highly specialized intercellular junctions which allow communicationby linking neurones of each nervous pathway

Synapses

12

T or F
The mechanism of conduction of the nerve impulse involves the release from MULTIPLE neurone of a chemical neurotransmitter which then diffuses across a narrow intercellular space to induce excitation or inhibition in the other neurone or effector cell

F
The mechanism of conduction of the nerve impulse involves the release from ONE neurone of a chemical neurotransmitterwhich then diffuses across a narrow intercellular space to induce excitation or inhibition in the other neurone or effector cell

13

In ______ disease an early pathological feature is loss of synapsesfrom the Hippocampus and Cerebrum; the synapses mediating neurotransmission are affected; acetylcholine is rapidly destroyed once secreted by cholinesterases

Alzheimer’s

14

______ of skeletal muscles have the same basic structure as other synapses; one motor neurone may innervate from a few to more than a thousand muscle fibers

Motor end plates

15

Most common primary disorder of neuromuscular transmission; patients develop fatigue and muscle weakness

Myasthenia gravis

16

What syndrome shows that there is an immune mediated destruction of myelin in the PNS; illness is often trigerred by an infection

Guillain-Barre syndrome

17

Coverings of Nerves?

Endoneurium
Perineurium
Epineurium

18

Group of neurons outside the CNS

Ganglion

19

T or F
Injured fibers in Peripheral nerves have a good capacity for regeneration and return of function

T

20

Onset of Regeneration is accompanied by changes in the ______

Perikaryon

21

_____ cells proliferate, forming a solid cellular column that is distal to the injury and that remains attached to the effector cell

Schwann

22

T or F
Degeneration is successful if the sprouting axon penetrates a Schwann cell column and reestablishes contact with the effector cell

F
REGENERATION is successful...