Nervous Tissue Flashcards

1
Q

derived from neural ectoderm

A

nervous tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

tissue composed of what?

A

neurons (nerve cell) and gliocytes (supporting cells)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

amorphous ground substance - minimal. fibers: mainly very fine collagen.

A

intercellular substance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

major component of nervous tissue and classified as neuron and gliocyte.

A

cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

produced by ependymal cells of the choroid plexus.

A

cerebrospinal fluid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

is a mass of villi that originate from the tela choroidea and form a fuzzy tuft of epithelium that extends into the brain vesicles.

A

choroid plexus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

cell membrane in nervous tissue is called?

A

neurolemma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

cytoplasm in nervous system is?

A

neuroplasm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

are highly secretory and they have lots of RER.

A

neurons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

is visible as a clump of basophilic materials in the perikaryon except in the axon hillock and axon.

A

chromophilic substance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

that transmits impulses

A

axon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

that receives impulses

A

dendrite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

the junction where a neuron communicates with another neuron or an effector cell is called?

A

synapse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

the terminal part of the axon releases a chemical called?

A

neurotransmitter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

single long process that arise from the bulging portion of the cell body

A

axon hillock

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

wraps spirally around it several time to form the lipid-rich.

A

myelin sheath

17
Q

starts at the point where the axon emerges from the axon hillock

A

myelination

18
Q

myelin sheath is discontinuous at intervals called?

A

myelin node

19
Q

bulb like junction between two adjacent neurolemmal cells

A

myelin node

20
Q

is the cytoplasmic region of myelin between the internode and the node of ranvier.

21
Q

it is the small circular profiles in the axoplasm

A

neutotubules

22
Q

are numerous in the axon, providing the power to run the sodium potassium pump that keeps transmembrane potential at normal levels.

A

mitochondria

23
Q

based on the number of cell processes

A

✓ unipolar neuron
✓ pseudounipolar neuron
✓ bipolar neuron
✓ multipolar neuron

24
Q

based on function of neuron

A
  • transmission or conducting neurons
  • secretory neurons
25
has only one process, the one axon. present only in the developing nervous system.
unipolar neuron
26
cell of the cranial and spinal ganglia. has two processes one axon and one dendrite that fuse close to the cell body but separate at some distance from it.
pseudounipolar neuron
27
synapses with sensory receptor or soma from another ganglion; brings signals to the soma in the cranianiospinal ganglion
afferent process
28
arises from the craniospinal and extends to the dorsal horn of the gray matter of the spinal cord where it synapses with an interconnector neuron; carries the signal from the soma to the interconnector neuron
efferent process
29
has two processes one axon and one dendrite that originate at opposite poles of the soma.
bipolar neuron
30
has many processes that arise from an oval, pyramidal or stellate soma. occurs in motor nuclei in the gray matter of the brain and spinal cord.
multipolar neuron
31
multipolar neurons that comprise the majority of neurons in the body.
transmission or conducting neurons
32
multipolar neurons specialized to secrete hormones
secretory neurons
33
derived from the ectoderm of the neural tube except for the microgliocytes
gliocytes of the CNS
34
the most numerous gliocytes in the CNS, even more than neurons.
astrocytes or spider cells.
35
termed "star cells" because of their stellate shape with numerous foot processes and a large, pale ovoid nucleus.
astrocytes or spider cells
36
have a long, thin, sparsely branched processes. located in the white matter
fibrous astrocytes
37
have numerous short, thick, highly branched processes. located in the gray matter.
protoplasmic astrocytes