Advanced Pathophysiology Exam 1
(Fully Updated 2026) Exam Questions + Verified &
220+
Rationalized Answers | A+ Graded
VERIFIED ANSWERS
Question 1
A certain disease is currently found in 1 of every 10 people in the country and 1,000 people contract the disease yearly. The
population of the country is 4,500,000. Which of the following statements is correct?
a. The prevalence of the disease is 10% and the incidence is .02%.
b. The prevalence of the disease is .02% and the incidence is 10%.
c. Neither is correct.
d. There is insufficient data
Correct Answer
A
Rationale:
The prevalence of the disease is correctly identified as 0.02% (1 in 5,000 people) because the disease is found in 1 in 10 people, not 1 in 10 of
a specific population subset, and the given population is the total population, not the subset of people with the disease. The incidence is
correctly identified as 10% relative risk (1 in 10 people contracts the disease yearly) because it represents the new cases of the disease in the
population each year.
Question 2
In relation to disease development, the term "etiology" refers to which of the following?
a.number of people with the disease
b. cause of the disease
c. definition of the disease
d. outcome of the disease
Correct Answer
B
Rationale:
The term "etiology" is concerned with identifying the underlying factors that contribute to the development of a disease. This focus on the root
causes of disease development directly relates to option b, as it implies the existence of a specific cause or set of causes that lead to the
disease.
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,Question 3
Which of the following is(are) true about "symptoms"?
a. objective and measurable
b. the same as "signs"
c. both of the above
d. neither of the above
Correct Answer
D
Rationale:
While symptoms are often subjective and reported by the patient, they can sometimes be objective and measurable, especially if they are
quantifiable, such as blood pressure or heart rate. However, symptoms and signs are not the same; symptoms are patient-reported
experiences, whereas signs are observable phenomena.
Question 4
In 1992, there were 980 deaths in a Midwestern city with a population of 1,000,000. At the beginning of that year, 900
cases of AIDS existed in this population. During the year, 250 new cases of AIDS were diagnosed, and 75 people died of the
disease in 1992.
Using the data given above, what was the incidence rate (per 100,000 population) at the end of 1992 for AIDS?
a. 6
b. 25
c. 88
d. 116
Correct Answer
B
Rationale:
To calculate the incidence rate, we need to determine the number of new AIDS cases that occurred in 1992, which is the sum of the initial
cases and the new cases diagnosed, minus the deaths due to AIDS. Since 90 initial cases (900 - 75 deaths) plus 250 new cases would be 340
total cases, the incidence rate is calculated by dividing 340 by 1,000,000, then multiplying by 100,000 to express it per 100,000 population.
Question 5
What level of prevention is a blood pressure screening program for high school students who are pregnant?
a. primary
b. secondary
c. tertiary
Correct Answer
B
Rationale:
A blood pressure screening program for high school students who are pregnant aims to identify individuals with high blood pressure before it
leads to any complications, thereby preventing the progression of the disease. This type of preventive measure falls under secondary
prevention, which targets individuals who already have a disease or condition, in this case, high blood pressure, to prevent its progression and
complications.
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,Question 6
Mr. Forbes complains of "indigestion" and becomes sweaty and pale. His wife takes him to the Emergency Department at
Northwestern Memorial Hospital. A cardiac catheterization 2 days later shows partial blockage of his right coronary artery
(RCA).
Blockage of the right coronary artery can lead to myocardial cell injury because it results in which of the following?
a. bilirubin accumulation in myocardial cells
b. alteration in the genetic material of myocardial cells
c. reduced energy production in myocardial cells
d. activation of the complement system
Correct Answer
C
Rationale:
The key concept here is that the right coronary artery (RCA) supplies blood to the myocardium, which is the muscle layer of the heart.
Blockage of the RCA leads to reduced blood flow and oxygenation, impairing the myocardial cells' ability to generate energy, making option c
the correct choice because it directly addresses the consequence of reduced blood flow.
Question 7
When myocardial cells are injured, the function of the Na-K membrane pump may be impaired. Which of the following may
then result?
a.intracellular sodium will increase
b. extracellular potassium will decrease
c. cell volume will decrease
d. all of the above
Correct Answer
A
Rationale:
When the Na-K membrane pump is impaired, it can no longer effectively remove sodium ions from the cell and pump potassium ions out,
leading to an accumulation of sodium ions inside the cell and an increase in extracellular potassium concentration. As a result, water rushes
into the cell due to osmosis, causing cell swelling and increasing cell volume, which is the opposite of option c.
Question 8
Mr. Forbes is being prepared for open heart surgery when he suffers a myocardial infarction in which a large part of his left
ventricle has suffered lethal cell injury.
Mr. Forbes' CPK-MB and LDH1, enzymes associated with myocardial cells, are significantly elevated. What is the best
explanation for this?
a. It is a sign that necrotic myocardial cells have released their cytoplasmic contents into the blood.
b. It is a sign of reversible fatty accumulation in the myocardial cells
c. It is a sign that the myocardial cells are undergoing hypertrophy.
d. None of the above.
Correct Answer
A
Rationale:
The elevated levels of CPK-MB and LDH1 enzymes in Mr. Forbes' blood are indicative of cell damage, as these enzymes are released into the
bloodstream when myocardial cells suffer lethal cell injury. This phenomenon occurs because the cell membrane is compromised, allowing the
enzymes to leak into the surrounding environment, thus resulting in the observed enzyme elevation.
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, Question 9
If a tissue specimen of myocardial cells were obtained for examination from Mr. Forbes, which of the following findings
would indicate irreversible cell injury?
a. cellular swelling
b. decreased ATP production
c. decreased intracellular calcium
d. dissolution of nuclear material
Correct Answer
D
Rationale:
The correct answer is "d" because the dissolution of nuclear material indicates a breakdown of the cell's structure and function, marking a
point of no return in the cell injury process, beyond which repair is no longer possible. This irreversible change signifies that the cell has
undergone necrosis, a form of cell death that cannot be reversed by any means.
Question 10
The accumulation of lactic acid that occurs with impaired energy production results from which of the following?
a. increased intracellular glucose
b. increased anaerobic metabolism
c. decreased metabolic rate
d. increased oxidative phosphorylation
Correct Answer
B
Rationale:
The accumulation of lactic acid occurs when cells switch from aerobic metabolism, which uses oxygen to generate energy, to anaerobic
metabolism, a process that relies on glucose breakdown without oxygen, resulting in the production of lactic acid as a byproduct. This shift
happens when energy production is impaired, causing cells to rely on anaerobic metabolism to generate energy, leading to the accumulation of
lactic acid.
Question 11
A mountain climber is stranded at 23,000 feet in the Swiss Alps and has lost all his equipment and supplies in an avalanche.
Subsequently, he suffers cell injury due to impaired ATP production. The reason for the decrease in ATP is which of the
following?
a. enzyme inhibition
b. uncoupling
c. hypoxia
d. none of the above
Correct Answer
C
Rationale:
The correct answer is "c. hypoxia" because at high altitudes such as 23,000 feet in the Swiss Alps, oxygen levels in the air are significantly
lower, which impairs the climber's ability to produce ATP (energy) in cells. This is because oxygen is essential for the final stage of cellular
respiration, where ATP is produced, and its deficiency leads to a decrease in ATP production, resulting in cell injury.
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(Fully Updated 2026) Exam Questions + Verified &
220+
Rationalized Answers | A+ Graded
VERIFIED ANSWERS
Question 1
A certain disease is currently found in 1 of every 10 people in the country and 1,000 people contract the disease yearly. The
population of the country is 4,500,000. Which of the following statements is correct?
a. The prevalence of the disease is 10% and the incidence is .02%.
b. The prevalence of the disease is .02% and the incidence is 10%.
c. Neither is correct.
d. There is insufficient data
Correct Answer
A
Rationale:
The prevalence of the disease is correctly identified as 0.02% (1 in 5,000 people) because the disease is found in 1 in 10 people, not 1 in 10 of
a specific population subset, and the given population is the total population, not the subset of people with the disease. The incidence is
correctly identified as 10% relative risk (1 in 10 people contracts the disease yearly) because it represents the new cases of the disease in the
population each year.
Question 2
In relation to disease development, the term "etiology" refers to which of the following?
a.number of people with the disease
b. cause of the disease
c. definition of the disease
d. outcome of the disease
Correct Answer
B
Rationale:
The term "etiology" is concerned with identifying the underlying factors that contribute to the development of a disease. This focus on the root
causes of disease development directly relates to option b, as it implies the existence of a specific cause or set of causes that lead to the
disease.
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,Question 3
Which of the following is(are) true about "symptoms"?
a. objective and measurable
b. the same as "signs"
c. both of the above
d. neither of the above
Correct Answer
D
Rationale:
While symptoms are often subjective and reported by the patient, they can sometimes be objective and measurable, especially if they are
quantifiable, such as blood pressure or heart rate. However, symptoms and signs are not the same; symptoms are patient-reported
experiences, whereas signs are observable phenomena.
Question 4
In 1992, there were 980 deaths in a Midwestern city with a population of 1,000,000. At the beginning of that year, 900
cases of AIDS existed in this population. During the year, 250 new cases of AIDS were diagnosed, and 75 people died of the
disease in 1992.
Using the data given above, what was the incidence rate (per 100,000 population) at the end of 1992 for AIDS?
a. 6
b. 25
c. 88
d. 116
Correct Answer
B
Rationale:
To calculate the incidence rate, we need to determine the number of new AIDS cases that occurred in 1992, which is the sum of the initial
cases and the new cases diagnosed, minus the deaths due to AIDS. Since 90 initial cases (900 - 75 deaths) plus 250 new cases would be 340
total cases, the incidence rate is calculated by dividing 340 by 1,000,000, then multiplying by 100,000 to express it per 100,000 population.
Question 5
What level of prevention is a blood pressure screening program for high school students who are pregnant?
a. primary
b. secondary
c. tertiary
Correct Answer
B
Rationale:
A blood pressure screening program for high school students who are pregnant aims to identify individuals with high blood pressure before it
leads to any complications, thereby preventing the progression of the disease. This type of preventive measure falls under secondary
prevention, which targets individuals who already have a disease or condition, in this case, high blood pressure, to prevent its progression and
complications.
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,Question 6
Mr. Forbes complains of "indigestion" and becomes sweaty and pale. His wife takes him to the Emergency Department at
Northwestern Memorial Hospital. A cardiac catheterization 2 days later shows partial blockage of his right coronary artery
(RCA).
Blockage of the right coronary artery can lead to myocardial cell injury because it results in which of the following?
a. bilirubin accumulation in myocardial cells
b. alteration in the genetic material of myocardial cells
c. reduced energy production in myocardial cells
d. activation of the complement system
Correct Answer
C
Rationale:
The key concept here is that the right coronary artery (RCA) supplies blood to the myocardium, which is the muscle layer of the heart.
Blockage of the RCA leads to reduced blood flow and oxygenation, impairing the myocardial cells' ability to generate energy, making option c
the correct choice because it directly addresses the consequence of reduced blood flow.
Question 7
When myocardial cells are injured, the function of the Na-K membrane pump may be impaired. Which of the following may
then result?
a.intracellular sodium will increase
b. extracellular potassium will decrease
c. cell volume will decrease
d. all of the above
Correct Answer
A
Rationale:
When the Na-K membrane pump is impaired, it can no longer effectively remove sodium ions from the cell and pump potassium ions out,
leading to an accumulation of sodium ions inside the cell and an increase in extracellular potassium concentration. As a result, water rushes
into the cell due to osmosis, causing cell swelling and increasing cell volume, which is the opposite of option c.
Question 8
Mr. Forbes is being prepared for open heart surgery when he suffers a myocardial infarction in which a large part of his left
ventricle has suffered lethal cell injury.
Mr. Forbes' CPK-MB and LDH1, enzymes associated with myocardial cells, are significantly elevated. What is the best
explanation for this?
a. It is a sign that necrotic myocardial cells have released their cytoplasmic contents into the blood.
b. It is a sign of reversible fatty accumulation in the myocardial cells
c. It is a sign that the myocardial cells are undergoing hypertrophy.
d. None of the above.
Correct Answer
A
Rationale:
The elevated levels of CPK-MB and LDH1 enzymes in Mr. Forbes' blood are indicative of cell damage, as these enzymes are released into the
bloodstream when myocardial cells suffer lethal cell injury. This phenomenon occurs because the cell membrane is compromised, allowing the
enzymes to leak into the surrounding environment, thus resulting in the observed enzyme elevation.
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, Question 9
If a tissue specimen of myocardial cells were obtained for examination from Mr. Forbes, which of the following findings
would indicate irreversible cell injury?
a. cellular swelling
b. decreased ATP production
c. decreased intracellular calcium
d. dissolution of nuclear material
Correct Answer
D
Rationale:
The correct answer is "d" because the dissolution of nuclear material indicates a breakdown of the cell's structure and function, marking a
point of no return in the cell injury process, beyond which repair is no longer possible. This irreversible change signifies that the cell has
undergone necrosis, a form of cell death that cannot be reversed by any means.
Question 10
The accumulation of lactic acid that occurs with impaired energy production results from which of the following?
a. increased intracellular glucose
b. increased anaerobic metabolism
c. decreased metabolic rate
d. increased oxidative phosphorylation
Correct Answer
B
Rationale:
The accumulation of lactic acid occurs when cells switch from aerobic metabolism, which uses oxygen to generate energy, to anaerobic
metabolism, a process that relies on glucose breakdown without oxygen, resulting in the production of lactic acid as a byproduct. This shift
happens when energy production is impaired, causing cells to rely on anaerobic metabolism to generate energy, leading to the accumulation of
lactic acid.
Question 11
A mountain climber is stranded at 23,000 feet in the Swiss Alps and has lost all his equipment and supplies in an avalanche.
Subsequently, he suffers cell injury due to impaired ATP production. The reason for the decrease in ATP is which of the
following?
a. enzyme inhibition
b. uncoupling
c. hypoxia
d. none of the above
Correct Answer
C
Rationale:
The correct answer is "c. hypoxia" because at high altitudes such as 23,000 feet in the Swiss Alps, oxygen levels in the air are significantly
lower, which impairs the climber's ability to produce ATP (energy) in cells. This is because oxygen is essential for the final stage of cellular
respiration, where ATP is produced, and its deficiency leads to a decrease in ATP production, resulting in cell injury.
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