Histology - Neural Tissue

Question 1

Identify the Green and Red Arrows

Answer 1

Green Arrow = Nerve Endings

Red Arrow = Spinal Ganglia

Question 2

What are glial Cells?

Answer 2

Support cells that are found throughout the nervous system

Question 3

Identify the purple and orange arrows

Answer 3

Purple Arrows = Axons and Long Dendrites

Orange Arrows = Neuronal Cell Bodies

Question 4

What are the two major regions of the spinal

cord?

Answer 4

Gray Matter = Neuronal Cell Bodies

White Matter = Axons and long dendrites

Question 5

What are multipolar neurons?

Answer 5

Neurons with an axon and several dendrites

e.g. Motor Neurons of the peripheral nervous system

Question 6

Identify the structures indicated by the arrows

Answer 6

Neuronal Cell Bodies

Question 7

Identify the structures indicated by the green and red arrows.

Answer 7

Green Arrows = Multipolar Motorneuron Cell Bodies

Red Arrows = Oligodendrocytes, Non-Neuronal Cells (Smaller round nuclei)

Question 8

Identify the structures indicated by the green, black, yellow, and red arrows

Also Identify Nissl Bodies

Answer 8

Green Arrows = Dendrites

Black Arrow = Delimitation of the Nucleus

Yellow Arrow = Nucleolus of a Nueron (abdunant euchromatin)

Red Arrows = Glial Cells

Nissl Bodies are the puple flaky weblike parts which also

comprise dendrites

Question 9

What is a perikaryon?

Answer 9

Cytoplasm of neuronal cell body

Question 10

What are Nissl substances/Nissl bodies

Answer 10

Clusters of rough endoplasmic reticulum in the cytoplasm of neurons.

Question 11

Identify the structures indicated by the arrows and the outlined regions

Answer 11

Arrow = Axon

Outlined Region = Hillux of the Axon

Important = Axons Lack Nissl Substance (Dendrites

contain Nissl Substance)

Question 12

What does this image depict?

Identify Structures A through D

Answer 12

Cell body of a motor neuron

A = Nissl Substance

B = Euchromatic Nucleus

C = Nucleolus

D = Capillary

Question 13

Identify structures indicated by A and B

Answer 13

A = Mitochondria

B = Nissl Bodies

Question 14

Identify the Areas indicated by the blue box

Answer 14

White matter of the spinal cord (oriented cranial caudally) contains mylenated axons and some dendrites and is sending information up and down the spinal cord.

Question 15

What time of staining was used?

Identify the structure indicated by the yellow arrow and the pale region surrounding the structure indicated by the yellow arrow.

Answer 15

Section was labeled with a silver stain

Yellow Arrow = Axon

Pale Region = Myelin

Question 16

Identify the structures indicated by/between the yellow arrows.

Answer 16

Myelin

Question 17

Identify the outlined regions

Answer 17

Outlined Regions = Locations where nerves can be found

Important = Neuronal Cell Bodies are NOT found in nerves

Question 18

Enseathment

Answer 18

During embryogenesis schwann cells initially surround several axons with their cytoplasm and plasma membrane

Smaller caliber axons remain enseathed

Question 19

What happens to large axons after embryogenesis?

Answer 19

Schwann cell selects a single axon to support and wraps its cytoplasm and plasma membrane around the axon several times. When the cytoplasm is squeezed out the remaining layer of shcwann cell membrane is called myelin

Question 20

Myelin

Answer 20

A region of axon that is wrapped with several Schwann cells

A single axon is myelinated by several schwann cells

Question 21

Nodes of Ranvier

Answer 21

Regions of bare axon not surrounded by myelin

Question 22

Identify the structures indicated by the letter A and the purple, red, and green arrows and the areas outlined in blue.

Answer 22

A = Schwann Cell Cytoplasm

Red Arrows = Gaps in the Schwann Cells which show they wrap around axons

Purple Arrows = Schwann cell plasma membrane and it’s external Lamina

Green Arrows = Two plasma membrans of axon and schwann cell

Blue Outline = Collagen (Reticular) Fibers

Question 23

Identify the structures indicated by the arrows

Answer 23

Blue Arrow = External Lamina

Purple Arrow = Many membrane layers of a single Schwann Cell

Yellow Arrow = Axonal Membrane

Red Arrow = Microtubules

Green Arrow = Neurofilaments (Intermediate Filaments)

Question 24

Identify the stain used and the structure indicated by the arrow.

Answer 24

Osmium tetroxide which labels myelin membrane

Arrow indicates nodes of ranvier

Question 25

Identify the view in the top portion of the image as compared to the bottom portion. Identify the structures indicated by the blue arrow as compared to the green arrows

Answer 25

Top portion is cross-sectional view of the axon Bottom portion = longitudinal view of the axon Green Arrow = Axon Blue Arrow = Edge of Myelin

Question 26

Identify the structures indicated by the blue outlines

Answer 26

Rodes of Ranvier

Question 27

Identify the structure outlined in green Identify the structures indicated by the black arrows

Answer 27

Peripheral Nerves (Numerous Nuclei and Wavy appearance and Elasticity) Perineurium

Question 28

Endoneurium

Answer 28

A loose connective tissue between axons

Question 29

Perineurium

Answer 29

A cellular layer that bundles many axons into structures called fasicles Has some characteristic features of epithelium including occluden junctions

Question 30

Epineurium

Answer 30

A dense connective tissue often conatining adipose that bundles fasicles together

Question 31

Identify the Black Arrows, Green Brackets, Middle Region

Answer 31

Middle Region = Endoneurium Black Arrows = Perineurium Green Arrows = Epineurium

Question 32

Identify the green and black arrows

Answer 32

Green Arrows = Endoneurium Black Arrows = Perineurium Upper Right/Left corners = Epineruium

Question 33

Identify Black Arrows, Green outline, and location of the endoneurium

Answer 33

Green Outline = Peripheral Nerve Black Arrow = Perineurium Endoneurium is area within the outlined region

Question 34

What comprises ganglia?

Answer 34

They consist of clusters of cell bodies, together with supporting cells that are contained within a connective tissue capsule

Question 35

Identify the structures indicated by the black arrows and the blue arrows.

Answer 35

Black Arrows = Neuronal Cell Bodies Blue Arrows = Connective tissue capsule

Question 36

Identify the structures indicated by the black, green, and blue arrows.

Answer 36

Black Arrows = Mark edge of one nucleus Blue Arrows = Prominent Nucleolus Green Arrows = Satellite Cells

Question 37

Identify the structures indicated by the black, green, and blue arrows.

Answer 37

Black Arrow = Nuclear Membrane Blue Arrow = Nucleolus Green Arrow = Satellite Cells

Question 38

Identify the structures indicated by the black, green, and blue arrows.

Answer 38

Black Arrow = Nuclear Membrane Blue Arrow = Nucleolus Green Arrow = Satellite Cells

Question 39

Identify the structure indicated between the two green arrows

Answer 39

Parasympathetic ganglium The perineurium is at the tips of the arrows.

Question 40

Identify the indicated structures What characteristic of this neuron reflect its high synthetic activity?

Answer 40

A = Dendrite B = Axon Abundant nissl substance and euchoromatic chromatin

Question 41

Identify the outlined region

Answer 41

Epineurium

Question 42

Identify the structure on this slide

Answer 42

Ganglion

Question 43

Identify the structure on this slide

Answer 43

Unilocular Adipose Tissue

Question 44

Identify the structure indicated by the arrows.

Answer 44

Perineurium

Question 45

Identify the structures indicated by the letters and between arrow heads

Answer 45

A = Schwann Cells or Maybe Fibroblasts B = Node of Ranvier C = Axon Between Arrow heads = Myelin Membrane

Question 46

Identify structures indicated by A through D

Answer 46

A. Schwann Cell Nucleus B. Schwann Cell Cytoplasm C. Myelinated Axon D. Unmyelinated Axon

Question 47

Identify the structures indicated by the arrows

Answer 47

Non-Keratinized Stratified Squamous

Question 48

Identify the structures indicated by the red, orange, green arrows

Answer 48

Red Arrows = Nucleolus Orange Arrow = Glial Cell Nucleus Green Arrow = Nissl Substance

Question 49

Identifty the structures indicated by the arrows

Answer 49

Orange arrows = Nodes of Ranvier Red Arrow = Broken Nerve

Question 50

Identify the structure outlined in green

Answer 50

Peripheral Nerve

Question 51

Identify the Structures indicated by the arrows

Answer 51

Yellow Arrow = Axon Blue Arrow = Myelin

Question 52

Identify the area outlined in yellow

Answer 52

Yellow Outline = Ganglion Red Arrow = Neuron

Question 53

Identify the structures indicated by the red and yellow X's

Answer 53

Red X = Axon Yellow X = Schwann Cell

Question 54

Identify the structures indicated by the arrows

Answer 54

Red Arrow = Satellite Cells Orange Arrows = Nuclear Membrane Black Arrow = Axon or Dendrite

Question 55

Identify structures indicated by the arrows.

Answer 55

Blue Arrow = Nucleus Pink Arrow = Dendrite or Axon (Can't discern) Blue Arrow = Either Axon or dendrite

Question 56

Identify the outlined region

Answer 56

Question 57

Identify structures indicated by the arrows/outline

Answer 57

Question 58

Identify the structures form numbers 1-7

Answer 58

1. Nucleus of Schwann cell 2. Schwann cell cytoplasm 3. (cytoplasm of another Schwann cell) 4. Golgi 5. Axons or dendrites 6. External lamina 7. Collagen

Question 59

Identify the structures indicated by the arrows/outlines

Answer 59

Yellow Arrow = Schwann Cells Green Arrow = Ganglion Orange Arrow = Neuron

Question 60

Identify the structures indicated by the arrows/outlines

Answer 60

Red Arrow = Axon Black Arrow = Axon Green Arrow = Perineurium Red Outline = Epineurium Blue Outline = Endoneurium

Question 61

Identify the structures indicated by the arrows/outlines

Answer 61

Green Outline = Peripheral Nerve Red Arrow = Most likely Schwann Cell Nuclei Black Arrow = Perineurium

Question 62

Identify the structures indicated by the outline

Answer 62

Multilocular Adipose Tissue

Question 63

Identify the structures indicated by the arrows

Answer 63

Yellow Arrow = Axon Brown Arrow = Myelin

Question 64

Identify the structures indicated by the outlines

Answer 64

Black Outline = Peripheral Nerve Yellow Outline = Dense Irregular Connective Tissue

Question 65

Identify Tissue Section

Answer 65

Ganglion

Question 66

Identify the structures indicated by the arrows/outlines

Answer 66

Black Arrow = Neuron Red Outline = Ganglion Green Outline = Loose Connective Tissue Green Arrows = Most Likely Schwann Cells