Nervous Tissue

Question 1

derived from neural ectoderm

Answer 1

nervous tissue

Question 2

tissue composed of what?

Answer 2

neurons (nerve cell) and gliocytes (supporting cells)

Question 3

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

Answer 3

intercellular substance

Question 4

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

Answer 4

cells

Question 5

produced by ependymal cells of the choroid plexus.

Answer 5

cerebrospinal fluid

Question 6

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

Answer 6

choroid plexus

Question 7

cell membrane in nervous tissue is called?

Answer 7

neurolemma

Question 8

cytoplasm in nervous system is?

Answer 8

neuroplasm

Question 9

are highly secretory and they have lots of RER.

Answer 9

neurons

Question 10

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

Answer 10

chromophilic substance

Question 11

that transmits impulses

Answer 11

axon

Question 12

that receives impulses

Answer 12

dendrite

Question 13

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

Answer 13

synapse

Question 14

the terminal part of the axon releases a chemical called?

Answer 14

neurotransmitter

Question 15

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

Answer 15

axon hillock

Question 16

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

Answer 16

myelin sheath

Question 17

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

Answer 17

myelination

Question 18

myelin sheath is discontinuous at intervals called?

Answer 18

myelin node

Question 19

bulb like junction between two adjacent neurolemmal cells

Answer 19

myelin node

Question 20

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

Answer 20

paranode

Question 21

it is the small circular profiles in the axoplasm

Answer 21

neutotubules

Question 22

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

Answer 22

mitochondria

Question 23

based on the number of cell processes

Answer 23

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

Question 24

based on function of neuron

Answer 24

• transmission or conducting neurons
• secretory neurons

Question 25

has only one process, the one axon. present only in the developing nervous system.

Answer 25

unipolar neuron

Question 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.

Answer 26

pseudounipolar neuron

Question 27

synapses with sensory receptor or soma from another ganglion; brings signals to the soma in the cranianiospinal ganglion

Answer 27

afferent process

Question 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

Answer 28

efferent process

Question 29

has two processes one axon and one dendrite that originate at opposite poles of the soma.

Answer 29

bipolar neuron

Question 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.

Answer 30

multipolar neuron

Question 31

multipolar neurons that comprise the majority of neurons in the body.

Answer 31

transmission or conducting neurons

Question 32

multipolar neurons specialized to secrete hormones

Answer 32

secretory neurons

Question 33

derived from the ectoderm of the neural tube except for the microgliocytes

Answer 33

gliocytes of the CNS

Question 34

the most numerous gliocytes in the CNS, even more than neurons.

Answer 34

astrocytes or spider cells.

Question 35

termed “star cells” because of their stellate shape with numerous foot processes and a large, pale ovoid nucleus.

Answer 35

astrocytes or spider cells

Question 36

have a long, thin, sparsely branched processes. located in the white matter

Answer 36

fibrous astrocytes

Question 37

have numerous short, thick, highly branched processes. located in the gray matter.

Answer 37

protoplasmic astrocytes