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Exercise 17: Histology of Nervous Tissue

front 1

THE BASIC FUNCTIONAL UNIT OF THE NERVOUS SYSTEM IS THE NEURON. WHAT IS THE MAJOR FUNCTION OF THIS CELL TYPE?

back 1

TO TRANSMIT AND GENERATE MESSAGES (NERVE IMPULSES) FROM ONE PART OF THE BODY TO ANOTHER.

front 2

NAME FOUR TYPES OF NEUROGLIA IN THE CNS, AND LIST A FUNCTION FOR EACH OF THESE CELLS.

back 2

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.

front 3

NAME THE PNS GLIAL CELL THAT FORMS MYELIN.

back 3

SCHWANN CELLS

front 4

NAME THE PNS GLIAL CELL THAT SURROUNDS DORSAL ROOT GANGLION NEURONS.

back 4

SATELLITE CELLS

front 5

THE BRAIN AND SPINAL CORD COLLECTIVELY

back 5

CENTRAL NERVOUS SYSTEM

front 6

SPECIALIZED SUPPORTING CELLS IN THE CNS

back 6

NEUROGLIA

front 7

JUNCTION OR POINT OF CLOSE CONTACT BETWEEN NEURONS

back 7

SYNAPSE

front 8

A BUNDLE OF NERVE PROCESSES INSIDE THE CNS

back 8

NERVE

front 9

NEURON SERVING AS PART OF THE CONDUCTION PATHWAY BETWEEN SENSORY AND MOTOR NEURONS

back 9

INTERNEURON

front 10

Ok, so you’re using my notecards which is great. I am glad I could help you out cause I wish I had someone to help me out when I took this course. I know Anatomy is super hard

back 10

I only ask that if you find these notecards helpful, you join Easy Notecards and create at least one notecard set to help others out. It can be for any subject or class. Thanks and don’t forget to rate my helpfulness!

front 11

GANGLIA AND SPINAL AND CRANIAL NERVES

back 11

TRACT

front 12

COLLECTION OF NERVE CELL BODIES FOUND OUTSIDE THE CNS

back 12

GANGLION

front 13

NEURON THAT CONDUCTS IMPULSES AWAY FROM THE CNS TO MUSCLES AND GLANDS

back 13

EFFERENT NEURON

front 14

NEURON THAT CONDUCTS IMPULSES TOWARD THE CNS FROM THE BODY PERIPHERY

back 14

AFFERENT NEURON

front 15

CHEMICALS RELEASED BY NEURONS THAT STIMULATE OR INHIBIT OTHER NEURONS OR EFFECTORS

back 15

NEUROTRANSMITTERS

front 16

REGION OF THE CELL BODY FROM WHICH THE AXON ORIGINATES

back 16

AXON HILLOCK

front 17

SECRETES NEUROTRANSMITTERS

back 17

AXON TERMINAL

front 18

RECEPTIVE REGION OF A NEURON

back 18

DENDRITE

front 19

INSULATES THE NERVE FIBERS

back 19

MYELIN SHEATH

front 20

SITE OF THE NUCLEUS AND MOST IMPORTANT METABOLIC AREA

back 20

NEURONAL CELL BODY

front 21

MAY BE INVOLVED IN THE TRANSPORT OF SUBSTANCES WITHIN THE NEURON

back 21

NEUROFIBRIL

front 22

ESSENTIALLY ROUGH ENDOPLASMIC RETICULUM, IMPORTANT METABOLICALLY

back 22

NISSL BODIES

front 23

IMPULSE GENERATOR AND TRANSMITTER

back 23

AXON

front 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.

back 24

front 25

WHAT SUBSTANCE IS FOUND IN SYNAPTIC VESICLES OF THE AXON TERMINAL?

back 25

NEUROTRANSMITTER

front 26

WHAT ROLE DOES THIS SUBSTANCE PLAY IN NEUROTRANSMISSION? (NEUROTRANSMITTER)

back 26

IT DIFFUSES ACROSS THE SYNAPTIC CLEFT TO BIND TO MEMBRANE RECEPTORS ON THE NEXT NEURON; INITIATING AN ELECTRICAL CURRENT (SYNAPTIC POTENTIAL).

front 27

WHAT ANATOMICAL CHARACTERISTIC DETERMINES WHETHER A PARTICULAR NEURON IS CLASSIFIED AS UNIPOLAR, BIPOLAR, AND MULTIPOLAR?

back 27

THEIR DIFFERENTIATED ACCORDING TO THE NUMBER OF PROCESSES ATTACHED TO THE CELL BODY.

front 28

MAKE A SIMPLE LINE DRAWING OF EACH TYPE:
UNIPOLAR, BIPOLAR, OR MULTIPOLAR

back 28

front 29

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

back 29

front 30

WHICH OF THESE NEURON TYPES IS/ARE UNIPOLAR?

back 30

SENSORY (AFFERENT) NEURON

front 31

WHICH IS/ARE MOST LIKELY MULTIPOLAR?

back 31

INTERNEURON (ASSOCIATION NEURON)

front 32

DESCRIBE HOW THE SCHWANN CELLS FROM THE MYELIN SHEATH AND THE NEURILEMMA ENCASING THE NERVE PROCESSES.

back 32

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.

front 33

WHAT IS A NERVE?

back 33

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.

front 34

STATE THE LOCATION OF EACH OF THE FOLLOWING CONNECTIVE TISSUE COVERINGS.

ENDONEURIUM, PERINEURIUM, EPINEURIUM

back 34

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.

front 35

WHAT IS THE FUNCTION OF THE CONNECTIVE TISSUE WRAPPINGS FOUND IN A NERVE?

back 35

TO INSULATE FROM OTHER PROCESSES AND TO BIND AND FORM BUNDLES, AND TO PROTECT.

front 36

DEFINE MIXED NERVE

back 36

A NERVE CARRYING BOTH SENSORY (AFFERENT) AND MOTOR (EFFERENT) FIBERS. MOST NERVES OF THE BODY, INCLUDING ALL SPINAL NERVES ARE MIXED NERVES.

front 37

IDENTIFY ALL INDICATED PARTS OF THE NERVE SECTION.

back 37