NSG5003 LATES 2022 GRADED A
Quiz 1
Question :
Why is it possible for potassium to diffuse easily into and out of
cells?
Student Potassium has a greater concentration in the ICF.
Answer:
Sodium has a greater concentration in the ECF.
The resting plasma membrane is more permeable to
potassium.
An excess of anions is inside the cell.
Instructor Because the resting plasma membrane is more permeable to K+ than to
Explanation: Na+, K+ can easily diffuse from its area of higher concentration in the ICF
to its area of lower concentration in the ECF. Because Na+ and K+ are both
cations, the net result is an excess of anions inside the cell, resulting in the
resting membrane potential. The remaining options do not correctly
identify the process that most easily diffuses K+.
Points Received: 0 of 0.5
Comments:
-565503819 MultipleChoice 27 False
0 -565503819 MultipleChoice 27
0 -565503818 MultipleChoice 56
Question 3 Question :
. A major determinant of the resting membrane potential necessary
for the transmission of nerve impulses is the ratio between:
Student Intracellular and extracellular Na+
Answer:
Intracellular and extracellular K+
Intracellular Na+ and extracellular K+
,NSG5003 LATES 2022 GRADED A
,NSG5003 LATES 2022 GRADED A
Intracellular K+ and extracellular Na+
Instructor The ratio of K+ in the ICF to K+ in the ECF is the major determinant of the
Explanation: resting membrane potential, which is necessary for the transmission and
conduction of nerve impulses, for the maintenance of normal cardiac
rhythms, and for the skeletal and smooth muscle contraction. This is not true
of the other options.
Points Received: 0 of 0.5
Comments:
-565503817 MultipleChoice 87 False
0 -565503817 MultipleChoice 87
0 -565503816 MultipleChoice 92
Question 5 Question :
. What is a consequence of plasma membrane damage to the
mitochondria?
Student Enzymatic digestion halts DNA synthesis.
Answer:
Influx of calcium ions halts ATP production.
Edema from an influx in sodium causes a reduction in ATP
production.
Potassium shifts out of the mitochondria, which destroys the
infrastructure.
Instructor The most serious consequence of plasma membrane damage is, as in
Explanation: hypoxic injury, to the mitochondria. An influx of calcium ions from the
extracellular compartment activates multiple enzyme systems, resulting in
cytoskeleton disruption, membrane damage, activation of inflammation,
and eventually DNA degradation. Calcium ion accumulation in the
mitochondria causes the mitochondria to swell, which is an occurrence
that is associated with irreversible cellular injury. The injured
mitochondria can no longer generate ATP, but they do continue to
accumulate calcium ions. The remaining options do not accurately
describe the consequence of plasma membrane damage to the
mitochondria.
Points Received: 0 of 0.5
, NSG5003 LATES 2022 GRADED A
Comments:
-565503815 MultipleChoice 42 False
0 -565503815 MultipleChoice 42
Question 6 Question :
. Current research supports the belief that after heart muscle injury,
the damage:
Student Remains indefinitely because cardiac cells do not reproduce
Answer:
Is repaired by newly matured cardiomyocytes
Gradually decreases in size as mitotic cell division occurs
Is replaced by hypertrophy of remaining cells
Quiz 1
Question :
Why is it possible for potassium to diffuse easily into and out of
cells?
Student Potassium has a greater concentration in the ICF.
Answer:
Sodium has a greater concentration in the ECF.
The resting plasma membrane is more permeable to
potassium.
An excess of anions is inside the cell.
Instructor Because the resting plasma membrane is more permeable to K+ than to
Explanation: Na+, K+ can easily diffuse from its area of higher concentration in the ICF
to its area of lower concentration in the ECF. Because Na+ and K+ are both
cations, the net result is an excess of anions inside the cell, resulting in the
resting membrane potential. The remaining options do not correctly
identify the process that most easily diffuses K+.
Points Received: 0 of 0.5
Comments:
-565503819 MultipleChoice 27 False
0 -565503819 MultipleChoice 27
0 -565503818 MultipleChoice 56
Question 3 Question :
. A major determinant of the resting membrane potential necessary
for the transmission of nerve impulses is the ratio between:
Student Intracellular and extracellular Na+
Answer:
Intracellular and extracellular K+
Intracellular Na+ and extracellular K+
,NSG5003 LATES 2022 GRADED A
,NSG5003 LATES 2022 GRADED A
Intracellular K+ and extracellular Na+
Instructor The ratio of K+ in the ICF to K+ in the ECF is the major determinant of the
Explanation: resting membrane potential, which is necessary for the transmission and
conduction of nerve impulses, for the maintenance of normal cardiac
rhythms, and for the skeletal and smooth muscle contraction. This is not true
of the other options.
Points Received: 0 of 0.5
Comments:
-565503817 MultipleChoice 87 False
0 -565503817 MultipleChoice 87
0 -565503816 MultipleChoice 92
Question 5 Question :
. What is a consequence of plasma membrane damage to the
mitochondria?
Student Enzymatic digestion halts DNA synthesis.
Answer:
Influx of calcium ions halts ATP production.
Edema from an influx in sodium causes a reduction in ATP
production.
Potassium shifts out of the mitochondria, which destroys the
infrastructure.
Instructor The most serious consequence of plasma membrane damage is, as in
Explanation: hypoxic injury, to the mitochondria. An influx of calcium ions from the
extracellular compartment activates multiple enzyme systems, resulting in
cytoskeleton disruption, membrane damage, activation of inflammation,
and eventually DNA degradation. Calcium ion accumulation in the
mitochondria causes the mitochondria to swell, which is an occurrence
that is associated with irreversible cellular injury. The injured
mitochondria can no longer generate ATP, but they do continue to
accumulate calcium ions. The remaining options do not accurately
describe the consequence of plasma membrane damage to the
mitochondria.
Points Received: 0 of 0.5
, NSG5003 LATES 2022 GRADED A
Comments:
-565503815 MultipleChoice 42 False
0 -565503815 MultipleChoice 42
Question 6 Question :
. Current research supports the belief that after heart muscle injury,
the damage:
Student Remains indefinitely because cardiac cells do not reproduce
Answer:
Is repaired by newly matured cardiomyocytes
Gradually decreases in size as mitotic cell division occurs
Is replaced by hypertrophy of remaining cells
