Neuron and Axon Dendrite Cilia

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Exp #2: Organization of Nervous Tissue

Exercise 1: Multipolar Neurons

Paste an image found on LabPaq site or Google images of a spinal cord smear and label its basic parts using basic labeling boxes provided. Identify the cell body, the nucleus, the large nucleolus, and granular Nissl bodies on the slide. Try to find the axon and differentiate it from the dendrites if possible. Hint: after pasting image, right click on it and select “order”, “send to back”.

cell body

nucleus

large nucleolus

Nissl bodies

axon

dendrites

Now, paste an image found on LabPaq site or Google images of a teased myelinated nerve and label its basic parts (nodes of Ranvier, neurilemma, the axon, Schwann cell nuclei and myelin sheath) using the labeling boxes provided.

myelin sheath

Schwann cell Nuclei

Axon

node of Ranvier

neurilemma

Questions
A. What is the function of a neuron?

B. What is the difference between a neuron and a nerve?

C. What gives a multipolar neuron its name?

D. What are the functions of the dendrites and axons?

Exercise 2: Structures of Selected Neurons

Paste an image of the Purkinje Cells Slide here and label its basic parts as best you can.

Receptor
Axon
Terminal buttons of axon

Dendrite
Cilia
Soma

Paste an image of the Pyramidal Cells Slide here and label its basic parts as best you can.

Receptor
Axon
Terminal buttons of axon

Dendrite
Cilia
Soma

Paste an image of the Dorsal Root Ganglion slide here and label its basic parts as best you can.

Receptor
Axon
Terminal buttons of axon

Dendrite
Cilia
Soma

A. Which slide contained bipolar neurons?

B. Which slide contained unipolar neurons?

C. What was unique about the dorsal root ganglion compared to the other two slides?

Exercise 3: The Neuroglia and Supporting Cells

Data Table 1: The Neuroglia and Supporting Cells
Cell| Function| Location (CNS/PNS)|
| Support and brace neurons to nutrient bloodcapillaries| | | Provide protection and sense neuron injuries. Canbe phagocytic.| | | Ciliated cells found in the cavities of the brain. Helpto circulate cerebrospinal fluid.| | | Makes the myelin sheath in the central nervoussystem.| | | Surround neuron cell bodies with ganglia. Functionis mostly unknown.| | | Produces the myelin sheath in the peripheralnervous system.| |

ation of Nervous Tissue
Exercise 4: Structure of a Nerve

Data Table 2: Structure of a Nerve
A. Fill in the functions for the labeled structures.
Item Description
1| |
2| |
3| |
4| |
5| |
6| |
7| |
8| |
9| |
Nervous Tissue
Questions
A. Describe the functions of the following parts of a nerve: 1. Endoneurium

2. Epineurium

3. Perineurium

4. Fascicle

B. What is a nerve? Describe to a layman or kindergartener.

C. Differentiate the central nervous system from the peripheral nervous system.

of Nervous Tissue
Exercise 5:
Questions …that you don’t need a pig for
A. Use an Anatomy and Physiology textbook if necessary to describe the functions of the Following nerves in humans:

Nerve| Functions|
1. Radial nerve:| |
2. Median nerve:| |
3. Sciatic nerve:| |
4. Fibular nerve:| |
5. Ulnar nerve:| |

B. What would be the consequences of an injury to the sacral plexus?
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