NURS 617 Exam 1, NURS 617 Exam 1 Questions and Correct Answers the Latest Updat
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Course
NURS 617
Institution
NURS 617
A direct result of anaerobic metabolism during hypoxic cell injury is:
a. increased ATP
b. metabolic acidosis
c. tissue ischemia
d. all of the above.
b. metabolic acidosis
Rationale: When oxygen is not available, cells switch to anaerobic metabolism,
which yields an acid called lactate,...
Nurs 617 Exam 3- Questions and Correct
Answers the Latest Update
Functions of the nervous system (4)
✓ - Detecting, analyzing and transmitting information
✓ o Provides foundation for intelligence, anticipation, and judgment
✓ o Controls skeletal muscle movement
✓ o Helps to regulate cardiac and visceral smooth activity
Definition of Neurons
✓ functional cells that conduct impulses to other nerve cells, muscles, or gland cells
Three parts of a neuron
✓ cell body, dendrites, axon
What does the cell body do?
✓ - Soma- nucleus- DNA and genetic codes
✓ - Cell activity
✓ - Metabolic activities
What do dendrites do?
✓ conduct info to cell body
✓ § Extension of cell body that brings info into the cell body
What does the axon do?
✓ Long projections from the cell body (normally only one) that pass nerve impulses
✓ - provide protection, regulate blood flow and metabolic support for the neurons
✓ o Form the myelin sheath from oligodendrocytes and Schwan cells
✓ § Helps with the transmission of electrical impulses along the nerve cells
Neuroglial cells of the central nervous system
✓ oligodendrocytes
Neuroglial cells of the peripheral nervous system
✓ Satellite
What do astrocytes do?
✓ help to form the blood-brain barrier, which prevents the entrance of toxic materials
from the blood to the brain
✓ presynaptic release of chemical messenger (neurotransmitters) -> placed in vesicle
within the synaptic cleft-> postsynaptic structures -> neurotransmitter removal
Two amino acid neurotransmitters
✓ Glutamate and GABA
Function of GABA
✓ main inhibitory messenger (vision/motor/anxiety)
✓ small gap between myelinated segments where axonal membrane is exposed;
increase speed of nerve impulses
Two kinds of neuropeptides
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