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Exam-NURS 5315 Module 7; Test Questions and Answers
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Exam-NURS 5315 Module 7; Test Questions andAnswers
CNS made of Correct-brain and spinal cord
Peripheral Nervous System made up of Correct-12 pairs of cranial nerves + 31 spinal nerves
Afferent Nerves Correct-Sensory nerves that carry impulses from cells, tissues, and organs
to the CNS
Efferent Nerves Correct-Carry impulses from the CNS to the cells, tissues, and organs.
Neuron Correct-Basic functional unit of the nervous system; primary fuel source is glucose
Cell body Correct-(1) Most are in the CNS.
(a) Nuclei: When cell bodies are densely grouped together
(b) Ganglia/Plexuses: Groups of cell nuclei in the PNS
Dendrite Correct-Projections that collect info and direct it to the cell body
, Exam-NURS 5315 Module 7; Test Questions and
Answers
Salutatory conduction Correct-Myeline sheath is responsible for allowing impulses to flow
between the nodes of Ranvier resulting in an increased velocity of impulses
Axon Correct-(1) Conducts impulses to the next neuron
(a) Covered w/ a myelin sheath (lipid material) and are interrupted by nodes of Ranvier
(b) Nutrient exchange cannot occur through the myelin, but it can occur in the nodes of
Ranvier.
Sensory Neurons Correct-AFFERENT neurons that carry impulses TOWARD the CNS
Motor Neurons Correct-EFFERENT neurons that carry impulses AWAY from the CNS
Associated Neurons Correct-Transmit impulses from neuron to neuron (only in the CNS)
Mature Neurons Correct-Don't replicate. Injury to them in the CNS is permanent.
, Exam-NURS 5315 Module 7; Test Questions and
Answers
Axonal Reaction Correct-Process of peripheral nerve can self-repair (slow)
Neuroglia types Correct-astrocytes, oligodendroglia, microglia, and ependyma cells
Astrocytes Correct-Fills the spaces between neurons & surround the blood vessels. Part of
the blood brain barrier, provide the rapid transport of nutrients & have a role in scar
formation & seizures.
Oligodendroglia Correct-(1) Form the myelin sheath of the brain & spinal cord (CNS).
(a) White Matter: Myelin sheath is white aka "white matter".
(b) Grey Matter: Areas w/o myelin sheath, which is composed mainly of neurons.
Microglia Correct-Tissue macrophages specific to the CNS
Ependymal Cells Correct-Line the ventricles of the brain and the choroid plexuses & are
involved in the production of CSF.
, Exam-NURS 5315 Module 7; Test Questions and
Answers
Schwann Cells Correct-Responsible for formation of the myelin sheath in the PNS and
provide metabolic support.
Synpases Correct-i) Where signals are transmitted from one neuron to another.
(1) Consist of presynaptic and post synaptic membrane which are separated by the synaptic
cleft.
Impulses are transmitted across the cleft via chemical or electrical means
Neurotransmitters function and types Correct-i) Synthesized in the neuron & localized in
the presynaptic terminal.
(1) They're stored on one side of the synaptic cleft & their receptors are located on the
opposite side
(2) Chemical synapses only work in one direction.
-acetylcholine, monoamines, amino acids
Acetylcholine Correct-(a) Is excitatory & inhibitory.
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