Nervous tissue

Question 1

Central nervous system

Answer 1

• brain and spinal cord

Question 1

Peripheral nervous system

Answer 1

– cranial and spinal nerve

Question 2

Nervous tissue Consists of:

Answer 2

Neuron
Supporting cells (neuroglia)

Question 3

Neuroglia found in CNS

Answer 3

Ependymal cells
Astrocytes
Oligodendrocytes
Microglia

Question 4

Neuroglia in PNS

Answer 4

Satellite cells
Schwann cells

Question 5

transmit electrical impulses from one site in the body to another, and receive and process
information

Answer 5

Neurons

Question 6

are non-conducting cells that are in
intimate physical contact with neurons

Answer 6

• Neuroglia

Question 7

Functional unit of nervous
system

Answer 7

neurons

Question 8

neurons consist of

Answer 8

cell body
processes (neurites)

Question 9

types of neurites

Answer 9

axon
dendrites

Question 10

long, cylindrical process
up to 1m

Answer 10

Axon

Question 11

nissl substance absent

Answer 11

Axon

Question 12

impulse – away from cell
body

Answer 12

Axon

Question 13

commonly refer to as nerve fibers

Answer 13

Axon

Question 14

Numerous, Highly branched

Answer 14

Dendrites

Question 15

Terminate near the cell body

Answer 15

Dendrites

Question 16

Nissl granules – present

Answer 16

Dendrites

Question 17

Impulse – towards the cell body

Answer 17

Dendrites

Question 18

– cell body of neuron; Unmyelinated

Answer 18

Gray matter

Question 19

myelinated fibers

Answer 19

White matter

Question 20

Aggregation of cell body
Within CNS – k/a –

Answer 20

nuclei

Question 21

Aggregation of cell body
Outside CNS – k/a –

Answer 21

ganglia

Question 22

Types of neurons are according to

Answer 22

a. According to the shape of cell body
b. According to variation in axon

Question 23

shape of the cell body dependent on the number
of processes arising from it.

Answer 23

a. According to the shape of cell body

Question 24

many processes arises from the cell body eg: motor neurons

Answer 24

Multipolar neuron

Question 25

single dendrites and axon eg: olfactory neuron, retina

Answer 25

Bipolar neurone

Question 26

single dendrite and the axon arise from common stem of the cell body eg: dorsal root ganglian

Answer 26

Unipolar neuron

Question 27

b. According to variation in axon 2 Types

Answer 27

Golgi type I Golgi type II: (microneurons)

Question 28

Long axon and connect remote regions

Answer 28

Golgi type I

Question 29

Short axon and end near the cell body Inhibitory in function

Answer 29

Golgi type II: (microneurons)

Question 30

* Small diameter axon * Simple envelop by the cytoplasm

Answer 30

Non myelinated

Question 31

* Large diameter fiber * Concentric layers

Answer 31

Myelinated fibers

Question 32

Afferent and efferent nerve fiber

Answer 32

Peripheral nerve

Question 33

1 or more bundle (fascicles) of nerve fibers within fascicle, each nerve fibers with its investing Schwann cells

Answer 33

endoneurium

Question 34

each fascicle is surrounded – tough Collagenous tissue with epithelial Cell

Answer 34

perineurium

Question 35

if > 1 fascicle, further layer of loose collagenous tissue

Answer 35

epineurium

Question 36

Supporting cell also called

Answer 36

(neuroglia)

Question 37

Non neural cell * Highly branches cell that occupy the space between neurons * Mechanical and metabolic support.

Answer 37

Supporting cell (neuroglia)

Question 38

Most numerous glial cell Long branched processes

Answer 38

Astrocytes

Question 39

Small cell * Mesenchymal in origin * Elongated nuclei * Little cytoplasm which forms, highly branch process

Answer 39

Microglia

Question 40

Becomes active after damage (Microglia)

Answer 40

phagocytes

Question 41

Epithelial lining of ventricles and spinal canal * Cuboidal to low columnar, and tightly bounded at luminal surface

Answer 41

Ependyma

Question 42

Responsible for myelination of axon * Wraps itself as spirally around a short segment of axon * Myelinate single axon

Answer 42

Schwann cell

Question 43

(lemnocytes, peripheral glial)

Answer 43

Schwann cell

Question 44

(capsular gliocytes)

Answer 44

Satellite cell

Question 45

* Flat cell that surround the cell bodies of neuron of PNS ganglia * Regulate exchange of material between neuron cell bodies and interstitial fluid

Answer 45

Satellite cell

Question 46

Collection of cell body in PNS

Answer 46

Ganglion

Question 47

2 types Ganglion

Answer 47

1. Sensory 2. Autonomic

Question 48

(Ganglion) unipolar, Fibers passes centrally * Ganglion cell located peripherally

Answer 48

Sensory

Question 49

(Ganglion) multipolar, Neuron are scattered throughout the ganglion * Nerve fiber are non myelinated and thinner so, less conspicuous than sensory

Answer 49

Autonomic ganglion