NURS 6620 FINAL EXAM 2025 COMPLETE QUESTIONS AND VERIFIED
ANSWERS | ACTUAL EXAM| ACCURATE SOLUTIONS WITH
RATIONALES/ALREADY GRADED A+ \ASSURED PASS
Sodium gates open, and sodium rushes into the cell,
changing the membrane potential from negative to
What causes the rapid positive.
change in the resting When a resting cell is stimulated through voltage-
membrane potential to regulated channels, the cell membranes become more
initiate an action potential? permeable to Na+. As Na+ moves into the cell the
membrane potential decreases, or moves forward, from
a negative value (in
millivolts) to zero. The Na+ gates open, and Na+ rushes into the
cell, causing the
membrane potential to reduce to zero and then become positive
(depolarization).
Swell because of the influx of sodium chloride (NaCl)
A reduction in ATP levels causes the plasma membrane's
What does the loss of the sodium-potassium (Na+-K+) pump and sodium-calcium
adenosine
exchange to fail, which leads to an intracellular
triphosphate (ATP) during
accumulation of sodium and calcium and diffusion of
ischemia cause cells to do?
potassium out of the cell. (The Na+-K+ pump is
discussed in Chapter 1.) Sodium and water can then freely
enter the cell, and cellular swelling results. The other
options do not accurately describe the result of ATP at
the cellular level.
Liver
What is the most common Although lipids sometimes accumulate in heart and
site of lipid accumulation? kidney cells, the most common site of intracellular lipid
accumulation, or fatty change, is liver cells.
Subcutaneous tissue is not a common site of lipid
accumulation.
Macromolecules can be secreted across eukaryotic cell
What occurs during membranes.
exocytosis? In eukaryotic cells, secretion of macromolecules almost
always occurs by exocytosis. The remaining options do
, 6/23/25, 5:57 AM NURS 6620 FINAL EXAM 2025 COMPLETE QUESTIONS AND VERIFIED ANSWERS | ACTUAL EXAM| ACCURATE SOLUTIONS…
not correctly describe exocytosis.
Plasma membrane-bound signaling molecules
Cells communicate in three main ways; they display plasma
membrane-bound
Which form of cell signaling molecules that affect the cell itself and other
communication is used to cells in direct physical contact with it, they affect
communicate within the receptor proteins inside the target cell, and they form
cell itself and with other protein
cells in direct physical channels (gap junctions) that directly coordinate the activities of
adjacent cells.
contact?
Neurotransmitters are released by neurons and
cross the synaptic cleft to communicate with the
cells they innervate. Ligands are involved in
binding processes.
Movement requiring the expenditure of metabolic energy
Active transport requires a life, biologic activity, and the
Which is the best example of
expenditure of metabolic energy. Movement due simply
active transport?
to differences in concentration gradients is called
passive transport. Movement of two molecules in the
same direction is called
symport, while moving two molecules in opposite directions is
called antiport.
Mediated
Mediated transport(passive and active) involves
Which method of transport
integral or transmembrane proteins with receptors
uses
transmembrane proteins having a high degree of specificity for the substance
with receptors with a high being
transported. Active and passive transport are opposites with
degree of specificity for active transport
the substance being requiring the use of energy and passive transport relying
transported? on osmosis, hydrostatic pressure, and diffusion and not
energy. Transmembranous means "across
membranes."
Lipid bilayer
The bilayer's structure accounts for one of the essential
functions of the plasma membrane. It is impermeable to
Which structure prevents most water-soluble molecules (molecules that
water-soluble molecules dissolve in water) because the water-soluble molecules
from entering cells across are insoluble in the oily core region. The bilayer serves
… 2/1
1
ANSWERS | ACTUAL EXAM| ACCURATE SOLUTIONS WITH
RATIONALES/ALREADY GRADED A+ \ASSURED PASS
Sodium gates open, and sodium rushes into the cell,
changing the membrane potential from negative to
What causes the rapid positive.
change in the resting When a resting cell is stimulated through voltage-
membrane potential to regulated channels, the cell membranes become more
initiate an action potential? permeable to Na+. As Na+ moves into the cell the
membrane potential decreases, or moves forward, from
a negative value (in
millivolts) to zero. The Na+ gates open, and Na+ rushes into the
cell, causing the
membrane potential to reduce to zero and then become positive
(depolarization).
Swell because of the influx of sodium chloride (NaCl)
A reduction in ATP levels causes the plasma membrane's
What does the loss of the sodium-potassium (Na+-K+) pump and sodium-calcium
adenosine
exchange to fail, which leads to an intracellular
triphosphate (ATP) during
accumulation of sodium and calcium and diffusion of
ischemia cause cells to do?
potassium out of the cell. (The Na+-K+ pump is
discussed in Chapter 1.) Sodium and water can then freely
enter the cell, and cellular swelling results. The other
options do not accurately describe the result of ATP at
the cellular level.
Liver
What is the most common Although lipids sometimes accumulate in heart and
site of lipid accumulation? kidney cells, the most common site of intracellular lipid
accumulation, or fatty change, is liver cells.
Subcutaneous tissue is not a common site of lipid
accumulation.
Macromolecules can be secreted across eukaryotic cell
What occurs during membranes.
exocytosis? In eukaryotic cells, secretion of macromolecules almost
always occurs by exocytosis. The remaining options do
, 6/23/25, 5:57 AM NURS 6620 FINAL EXAM 2025 COMPLETE QUESTIONS AND VERIFIED ANSWERS | ACTUAL EXAM| ACCURATE SOLUTIONS…
not correctly describe exocytosis.
Plasma membrane-bound signaling molecules
Cells communicate in three main ways; they display plasma
membrane-bound
Which form of cell signaling molecules that affect the cell itself and other
communication is used to cells in direct physical contact with it, they affect
communicate within the receptor proteins inside the target cell, and they form
cell itself and with other protein
cells in direct physical channels (gap junctions) that directly coordinate the activities of
adjacent cells.
contact?
Neurotransmitters are released by neurons and
cross the synaptic cleft to communicate with the
cells they innervate. Ligands are involved in
binding processes.
Movement requiring the expenditure of metabolic energy
Active transport requires a life, biologic activity, and the
Which is the best example of
expenditure of metabolic energy. Movement due simply
active transport?
to differences in concentration gradients is called
passive transport. Movement of two molecules in the
same direction is called
symport, while moving two molecules in opposite directions is
called antiport.
Mediated
Mediated transport(passive and active) involves
Which method of transport
integral or transmembrane proteins with receptors
uses
transmembrane proteins having a high degree of specificity for the substance
with receptors with a high being
transported. Active and passive transport are opposites with
degree of specificity for active transport
the substance being requiring the use of energy and passive transport relying
transported? on osmosis, hydrostatic pressure, and diffusion and not
energy. Transmembranous means "across
membranes."
Lipid bilayer
The bilayer's structure accounts for one of the essential
functions of the plasma membrane. It is impermeable to
Which structure prevents most water-soluble molecules (molecules that
water-soluble molecules dissolve in water) because the water-soluble molecules
from entering cells across are insoluble in the oily core region. The bilayer serves
… 2/1
1
