CNS Exam 3 Questions & Answers 2024/2025
Central Nervous System - ANSWERSWhat does CNS stand for?
Brain and Spinal Chord - ANSWERSWhat makes up the central nervous system?
Sensory (afferent) - ANSWERSAscending Tracts. What neurons ascend to the brain?
Motor (efferent) - ANSWERSDescen...
Central Nervous System - ANSWERSWhat does CNS stand for?
Brain and Spinal Chord - ANSWERSWhat makes up the central nervous system?
Sensory (afferent) - ANSWERSAscending Tracts. What neurons ascend to the brain?
Motor (efferent) - ANSWERSDescending Tracts: What neurons descend down the spinal chord and out
through the nerves?
Neurons and Neurogila - ANSWERSTissues of the nervous system is composed of two types of cells:
Neurons - ANSWERSThat conduct impulses but generally can not divide (excitable).
Neuroglia - ANSWERSThat support the neurons and can not conduct impulses, but can divide. (All of the
support cells)
Myelin - ANSWERSYou can tell that it is a CNS Neuron by the type of ______.
Soma - ANSWERSThe nucleus is located in the ________.
Astrocyte - ANSWERSRegulate the external environment of the nucleus (Support cells of the CNS, Blood
grain barrier)
Axon Terminals - ANSWERSSends information to the next cell (Neurotransmitters)
, Oligodendrocyte - ANSWERSForm myelin sheaths around the axons of CNS neurons (provides insulation)
(Pseudo)unipolar - ANSWERSsingle short process that branches like a T to form 2 longer processes;
sensory neurons
Bipolar Neurons - ANSWERSHave two processes, one on either end; found in the retina of eye
Multipolar Neurons - ANSWERSSeveral dendrites and one axon; most common; motor neurons
Sensory Neurons - ANSWERSconduct impulses from sensory receptors to the CNS (afferent)
Motor Neurons - ANSWERSconduct impulses from the CNS to target organs (muscles or glands; efferent)
Association/ interneurons - ANSWERSlocated completely within the CNS and integrate functions of the
nervous system
Axons, Outside - ANSWERSNerves are bundles of ______ located _______ the CNS.
Mixed Nerves - ANSWERSNerves carrying both sensory and motor fibers
Sensory - ANSWERSSome of the cranial nerves have _____ fibers only.
Tract - ANSWERSA bundle of axons in the CNS
Nucleus - ANSWERSA bundle of cell bodies in the CNS
Microglia - ANSWERSmigrate around CNS tissue and phagocytize foreign and degenerated material
(smallest)
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