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Exercise 17: Histology of Nervous Tissue


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1
THE BASIC FUNCTIONAL UNIT OF THE NERVOUS SYSTEM IS THE NEURON. WHAT IS THE MAJOR FUNCTION OF THIS CELL TYPE?
TO TRANSMIT AND GENERATE MESSAGES (NERVE IMPULSES) FROM ONE PART OF THE BODY TO ANOTHER.
2
NAME FOUR TYPES OF NEUROGLIA IN THE CNS, AND LIST A FUNCTION FOR EACH OF THESE CELLS.
1. ASTROCYTES, HELPS REGULATE THE EXTRACELLULAR COMPOSITION OF BRAIN FLUID.

2. EPENDYMAL CELLS, SECRETES CEREBROSPINAL FLUID & HELPS MOVE CEREBROSPINAL FLUID IN BRAIN AND SPINAL CORD.

3. MICROGLIA, ARE PHAGOCYTIC CELLS IN THE CENTRAL NERVOUS SYSTEM (CNS)

4. OLIGODENDROCYTES, FORM PART OF THE MYELIN SHEATHS OF AXONS WITHIN THE CNS.
3
NAME THE PNS GLIAL CELL THAT FORMS MYELIN.
SCHWANN CELLS
4
NAME THE PNS GLIAL CELL THAT SURROUNDS DORSAL ROOT GANGLION NEURONS.
SATELLITE CELLS
5
THE BRAIN AND SPINAL CORD COLLECTIVELY
CENTRAL NERVOUS SYSTEM
6
SPECIALIZED SUPPORTING CELLS IN THE CNS
NEUROGLIA
7
JUNCTION OR POINT OF CLOSE CONTACT BETWEEN NEURONS
SYNAPSE
8
A BUNDLE OF NERVE PROCESSES INSIDE THE CNS
NERVE
9
NEURON SERVING AS PART OF THE CONDUCTION PATHWAY BETWEEN SENSORY AND MOTOR NEURONS
INTERNEURON
10
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11
GANGLIA AND SPINAL AND CRANIAL NERVES
TRACT
12
COLLECTION OF NERVE CELL BODIES FOUND OUTSIDE THE CNS
GANGLION
13
NEURON THAT CONDUCTS IMPULSES AWAY FROM THE CNS TO MUSCLES AND GLANDS
EFFERENT NEURON
14
NEURON THAT CONDUCTS IMPULSES TOWARD THE CNS FROM THE BODY PERIPHERY
AFFERENT NEURON
15
CHEMICALS RELEASED BY NEURONS THAT STIMULATE OR INHIBIT OTHER NEURONS OR EFFECTORS
NEUROTRANSMITTERS
16
REGION OF THE CELL BODY FROM WHICH THE AXON ORIGINATES
AXON HILLOCK
17
SECRETES NEUROTRANSMITTERS
AXON TERMINAL
18
RECEPTIVE REGION OF A NEURON
DENDRITE
19
INSULATES THE NERVE FIBERS
MYELIN SHEATH
20
SITE OF THE NUCLEUS AND MOST IMPORTANT METABOLIC AREA
NEURONAL CELL BODY
21
MAY BE INVOLVED IN THE TRANSPORT OF SUBSTANCES WITHIN THE NEURON
NEUROFIBRIL
22
ESSENTIALLY ROUGH ENDOPLASMIC RETICULUM, IMPORTANT METABOLICALLY
NISSL BODIES
23
IMPULSE GENERATOR AND TRANSMITTER
AXON
24
DRAW A "TYPICAL" MULTIPOLAR NEURON. INCLUDE ANDD LABEL THE FOLLOWING STRUCTURES ON YOUR DIAGRAM: CELL BODY, NUCLEUS, NUCLEOLUS, nISSL bODIES, DENDRITES, AXON, AXON COLLATERAL BRANCH, MYELIN SHEATH, NODES OF RANVIER, AXON TERMINALS, AND NEUROFIBRILS.
25
WHAT SUBSTANCE IS FOUND IN SYNAPTIC VESICLES OF THE AXON TERMINAL?
NEUROTRANSMITTER
26
WHAT ROLE DOES THIS SUBSTANCE PLAY IN NEUROTRANSMISSION? (NEUROTRANSMITTER)
IT DIFFUSES ACROSS THE SYNAPTIC CLEFT TO BIND TO MEMBRANE RECEPTORS ON THE NEXT NEURON; INITIATING AN ELECTRICAL CURRENT (SYNAPTIC POTENTIAL).
27
WHAT ANATOMICAL CHARACTERISTIC DETERMINES WHETHER A PARTICULAR NEURON IS CLASSIFIED AS UNIPOLAR, BIPOLAR, AND MULTIPOLAR?
THEIR DIFFERENTIATED ACCORDING TO THE NUMBER OF PROCESSES ATTACHED TO THE CELL BODY.
28
MAKE A SIMPLE LINE DRAWING OF EACH TYPE:
UNIPOLAR, BIPOLAR, OR MULTIPOLAR
29

CORRECTLY IDENTIFY THE SENSORY (AFFERENT) NEURON, INTERNEURON (ASSOCIATION NEURON), AND MOTOR (EFFERENT) NEURON IN THE FIGURE.
30

WHICH OF THESE NEURON TYPES IS/ARE UNIPOLAR?
SENSORY (AFFERENT) NEURON
31

WHICH IS/ARE MOST LIKELY MULTIPOLAR?
INTERNEURON (ASSOCIATION NEURON)
32
DESCRIBE HOW THE SCHWANN CELLS FROM THE MYELIN SHEATH AND THE NEURILEMMA ENCASING THE NERVE PROCESSES.
SCHWANN CELLS WRAP THEMSELVES TIGHTLY AROUND THE AXON IN A JELLYROLL FASHION; AND THE NEURILEMMA IS A EXPOSED PLASMA MEMBRANE, HAS MANY SCHWANN CELLS AND IS A DISCONTINOUS SHEATH.
33
WHAT IS A NERVE?
A NERVE IS A BUNDLE OF NEURON FIBERS (AXONS) WRAPPED IN CONNECTIVE TISSUE COVERING THAT EXTENDS TO AND FROM THE CNS AND VISCERAL ORGANS OR STRUCTURES OF THE BODY PERIPHERY.
34
STATE THE LOCATION OF EACH OF THE FOLLOWING CONNECTIVE TISSUE COVERINGS.

ENDONEURIUM, PERINEURIUM, EPINEURIUM
ENDONEURIUM - INNER MOST LAYER, AN ADDITIONAL SHEATH THAT SURROUNDS THE MYELIN SHEATH.

PERINEURIUM - MIDDLE LAYER, BOUNDS GROUPS OF FIBERS, FORMS BUNDLES OF FIBERS.

EPINEURIUM - OUTER MOST LAYER, BOUNDS FASCICLES TOGETHER, FORMS THE CORDLIKE NERVE.
35
WHAT IS THE FUNCTION OF THE CONNECTIVE TISSUE WRAPPINGS FOUND IN A NERVE?
TO INSULATE FROM OTHER PROCESSES AND TO BIND AND FORM BUNDLES, AND TO PROTECT.
36
DEFINE MIXED NERVE
A NERVE CARRYING BOTH SENSORY (AFFERENT) AND MOTOR (EFFERENT) FIBERS. MOST NERVES OF THE BODY, INCLUDING ALL SPINAL NERVES ARE MIXED NERVES.
37

IDENTIFY ALL INDICATED PARTS OF THE NERVE SECTION.

Comments (38)

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melissaS 6 weeks ago

CAN ANYONE PLEEEASE TELL ME: is this 10th edition's exercise 17 the same as the 11th editions exercise 15?

MelissaKioko 5 months ago

thanks for the notecards!!!!

pocketpalgal 9 months ago

#22 should be Chromatophilic substance.
Great notecards!!

cabrales 9 months ago

#8 should be tract, there are no nerves within the CNS.
#11 should be PNS or peripheral nervous system.

These are great, thank you!

c2089266 9 months ago

thank* lol

c2089266 9 months ago

huuuge help thenk you!

jillebutter 9 months ago

Thanks!

Darlove78 1 year ago

Nice, thank you for the notecards .big help

Pink1967 1 year ago

your awesome !!!!! wow

yazeed 2 years ago

Awesome !! thnx a lot, it really helped.

Helpfulness:62

 

Description

Lab Exercise 17
pg.265-268
Im making these notecards to help, so if you use them, please sign up and help add more notecards! And dont forget to ra...

Book

Human Anatomy & Physiology

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Created

3 years agoby jncanf

Last updated

3 years agoby jncanf

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Subjects

science, life sciences, human anatomy & physiology

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