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EXSC 224 Exam 1 Questions with 100% Correct Answers | Latest Update
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EXSC 224 Exam 1 Questions with 100% Correct Answers | Latest Update sensory input - information gathered by sensory receptors about internal and external changes integration - interpretation of sensory input motor output - activation of effector organs (i.e..muscles glands) and produces a res...

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  • December 23, 2024
  • 18
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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EXSC 224 Exam 1 Questions with 100%

Correct Answers | Latest Update


sensory input - ✔✔information gathered by sensory receptors about

internal and external changes

integration - ✔✔interpretation of sensory input

motor output - ✔✔activation of effector organs (i.e..muscles glands) and

produces a response

What are the 2 principal cell types in the nervous system? - ✔✔neuroglia,

neurons

neuroglia - ✔✔(glial cells)--supporting cells...there are 6 different kinds

neurons - ✔✔excitable cells that transmit information at synapses signals

astrocytes - ✔✔In the CNA; help determine capillary permeability; most

abundant, versatile, and highly branched glial cells

microglia - ✔✔CNS glial cells--small, have thorny processes, migrate

toward injured neurons, they consume microorganisms and neuronal debris




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©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

,ependymal cells - ✔✔CNS glial cells--line the cavities of brain and spinal

column, separate CNS interstitial fluid from CSF, produce CSF at choroid

plexuses

oligodendrocytes - ✔✔CNS glial cells--branched, processes wrap around

multiple axon in CNS to form myelin sheaths

What is the demyelination in the CNS? - ✔✔multiple sclerosis

satellite cells - ✔✔PNS glial cells- surround neuron cell bodies, form myelin

schwann cells - ✔✔(neurolemmocytes) surround peripheral nerve fibers,

form myelin sheaths

Which cell type is vital for the regeneration of damaged peripheral nerve

fibers? - ✔✔schwann cells

neurons - ✔✔primary cell in the nervous system

special characteristics of neurons - ✔✔long lived, amitotic, high metabolic

rate (fuel of oxygen and glucose), plasma membrane has several functions

neuron plasma membrane functions - ✔✔electrical signaling, cell-to-cell

interactions during development

What are the three things that the nervous system does? - ✔✔sensory

input, integration, motor output



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©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

, neuron cell body - ✔✔biosynthetic center and receptive region

nissl bodies - ✔✔rough ER

axon hillock - ✔✔cone-shaped area from which axon arises

tracts - ✔✔dendrites and axons in the CNS

nerves - ✔✔dendrites and axons in the PNS

dendrites - ✔✔receptive region, short, tapering, convey input toward the

cell body--graded potentials

axon - ✔✔one per cell, numerous terminal branches, generates and

transmits impulses (action potentials)

myelin sheath - ✔✔protein-lipoid sheath around axons--protect, insulates,

and speeds up nerve impulse transmission

True or false: all neurons are myelinated - ✔✔FALSE

myelin sheaths in the PNS are made up of what kind of cells? -

✔✔schwann cells

myelin sheaths in the CNS are formed by... - ✔✔processes of

oligodendrocytes, thinnest fibers are unmyelinated

white matter - ✔✔dense collections of myelinated fibers

gray matter - ✔✔mostly neuron cell bodies and unmyelinated fibers


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