Advanced Pathophysiology N-
6501 Final Exam-A+ ()
Table of Contents
1. Cellular Biology and Genetics (Questions 1-15)
2. Mechanisms of Disease: Inflammation, Immunity, and Infection (Questions 16-35)
3. Disorders of Fluid, Electrolyte, and Acid-Base Balance (Questions 36-45)
4. Cardiovascular and Lymphatic Disorders (Questions 46-65)
5. Respiratory Disorders (Questions 66-80)
6. Renal and Urologic Disorders (Questions 81-95)
7. Neurologic and Sensory Disorders (Questions 96-110)
8. Endocrine and Metabolic Disorders (Questions 111-125)
9. Multisystem and Integrative Concepts (Questions 126-130)
Section 1: Cellular Biology and Genetics
1. A cell is placed in a hypertonic solution. What is the expected effect on the cell?
A. The cell will swell and potentially burst.
B. The cell will shrink (crenate).
C. There will be no net movement of water.
D. The cell will actively pump solutes out to maintain size.
B. The cell will shrink (crenate).
Rationale: A hypertonic solution has a higher solute concentration than the inside of the
cell. This creates an osmotic gradient that pulls water out of the cell, causing it to shrink.
2. Which of the following are characteristics of apoptosis? (Select All That Apply)
A. It is a form of programmed cell death.
B. It typically triggers a significant inflammatory response.
C. It involves cell shrinkage and formation of apoptotic bodies.
,D. It is a passive process of cellular degradation.
E. It is an energy-dependent process (requires ATP).
A, C, E
Rationale: Apoptosis is programmed, energy-dependent, and results in cell shrinkage and
apoptotic bodies that are cleanly phagocytosed, avoiding inflammation. Necrosis, in contrast, is
passive, causes cell swelling, and triggers inflammation.
3. A patient has a mutation in a tumor suppressor gene. This mutation would most likely lead
to:
A. Uncontrolled cell proliferation due to a lack of "brakes" on the cell cycle.
B. Increased activity of growth factor receptors.
C. A decrease in the rate of apoptosis.
D. Both A and C are correct.
D. Both A and C are correct.
Rationale: Tumor suppressor genes, such as p53 and Rb, normally function to halt the cell
cycle, repair DNA, or initiate apoptosis if damage is irreparable. A loss-of-function mutation in
these genes removes the "brakes" on proliferation and can also prevent programmed cell death.
4. Which of the following is an example of a proto-oncogene?
A. p53
B. BRCA1
C. RAS
D. Rb
C. RAS
Rationale: Proto-oncogenes are normal genes that promote cell growth and division. When
mutated, they can become oncogenes, leading to uncontrolled growth. RAS is a classic example.
p53, BRCA1, and Rb are all tumor suppressor genes.
5. During which phase of the cell cycle does DNA replication occur?
A. G1 phase
B. S phase
C. G2 phase
D. M phase
B. S phase
Rationale: The S phase (Synthesis phase) is the part of the cell cycle in which DNA is
replicated, occurring between G1 phase and G2 phase.
,6. A patient with Down syndrome has an increased risk for developing early-onset Alzheimer's
disease. This is an example of:
A. Pleiotropy
B. Genetic heterogeneity
C. Aneuploidy leading to a specific comorbidity
D. Genomic imprinting
C. Aneuploidy leading to a specific comorbidity
Rationale: Down syndrome is caused by aneuploidy (trisomy 21). The extra copy of
chromosome 21 includes the APP gene, which is associated with amyloid-beta production,
explaining the increased risk for early-onset Alzheimer's disease.
7. What is the primary difference between a benign and a malignant tumor?
A. Benign tumors are always smaller than malignant tumors.
B. Malignant tumors are encapsulated, while benign tumors are not.
C. Malignant tumors have the ability to invade and metastasize.
D. Benign tumors grow faster than malignant tumors.
C. Malignant tumors have the ability to invade and metastasize.
Rationale: The defining characteristic of a malignant tumor is its capacity for invasion of
surrounding tissues and metastasis to distant sites. Benign tumors remain localized and
encapsulated.
8. Which of the following genetic principles explains why a person with a single copy of a
mutated BRCA1 gene has a high risk of cancer?
A. Recessive inheritance
B. X-linked inheritance
C. Autosomal dominant inheritance with incomplete penetrance
D. Mitochondrial inheritance
C. Autosomal dominant inheritance with incomplete penetrance
Rationale: A mutation in one copy of a tumor suppressor gene like BRCA1 is often inherited
in an autosomal dominant pattern. This means inheriting one mutated copy is enough to
significantly increase risk, but it doesn't guarantee cancer will develop (incomplete penetrance),
as a "second hit" mutation is often required in the other allele.
9. Marfan syndrome is caused by a defect in which protein?
A. Collagen
B. Fibrillin
, C. Keratin
D. Elastin
B. Fibrillin
Rationale: Marfan syndrome is an autosomal dominant disorder caused by mutations in the
FBN1 gene, which encodes the protein fibrillin-1. This protein is a major component of
microfibrils in the extracellular matrix, providing structural support to connective tissues.
10. Which type of cell is most susceptible to injury from ischemia?
A. Skeletal muscle cell
B. Neurons
C. Fibroblast
D. Adipocyte
B. Neurons
Rationale: Neurons have a very high metabolic rate and an absolute dependence on a
continuous supply of oxygen and glucose. They are the most sensitive cells in the body to
ischemic injury, suffering irreversible damage within minutes.
11. Metaplasia is best defined as:
A. An increase in the number of cells in a tissue.
B. An increase in the size of individual cells.
C. The reversible replacement of one mature cell type by another.
D. A disorderly, pre-cancerous change in cell size and shape.
C. The reversible replacement of one mature cell type by another.
Rationale: Metaplasia is an adaptive response to chronic stress where one differentiated
cell type is replaced by another, often less specialized type (e.g., columnar to squamous in the
smoker's airway).
12. A patient with a known genetic disorder asks about the phenomenon where the severity
of the disease increases in successive generations. This is known as:
A. Anticipation
B. Mosaicism
C. Imprinting
D. Pleiotropy
A. Anticipation
Rationale: Genetic anticipation is a phenomenon where the signs and symptoms of a
genetic disorder become apparent at an earlier age and/or with increased severity as the
6501 Final Exam-A+ ()
Table of Contents
1. Cellular Biology and Genetics (Questions 1-15)
2. Mechanisms of Disease: Inflammation, Immunity, and Infection (Questions 16-35)
3. Disorders of Fluid, Electrolyte, and Acid-Base Balance (Questions 36-45)
4. Cardiovascular and Lymphatic Disorders (Questions 46-65)
5. Respiratory Disorders (Questions 66-80)
6. Renal and Urologic Disorders (Questions 81-95)
7. Neurologic and Sensory Disorders (Questions 96-110)
8. Endocrine and Metabolic Disorders (Questions 111-125)
9. Multisystem and Integrative Concepts (Questions 126-130)
Section 1: Cellular Biology and Genetics
1. A cell is placed in a hypertonic solution. What is the expected effect on the cell?
A. The cell will swell and potentially burst.
B. The cell will shrink (crenate).
C. There will be no net movement of water.
D. The cell will actively pump solutes out to maintain size.
B. The cell will shrink (crenate).
Rationale: A hypertonic solution has a higher solute concentration than the inside of the
cell. This creates an osmotic gradient that pulls water out of the cell, causing it to shrink.
2. Which of the following are characteristics of apoptosis? (Select All That Apply)
A. It is a form of programmed cell death.
B. It typically triggers a significant inflammatory response.
C. It involves cell shrinkage and formation of apoptotic bodies.
,D. It is a passive process of cellular degradation.
E. It is an energy-dependent process (requires ATP).
A, C, E
Rationale: Apoptosis is programmed, energy-dependent, and results in cell shrinkage and
apoptotic bodies that are cleanly phagocytosed, avoiding inflammation. Necrosis, in contrast, is
passive, causes cell swelling, and triggers inflammation.
3. A patient has a mutation in a tumor suppressor gene. This mutation would most likely lead
to:
A. Uncontrolled cell proliferation due to a lack of "brakes" on the cell cycle.
B. Increased activity of growth factor receptors.
C. A decrease in the rate of apoptosis.
D. Both A and C are correct.
D. Both A and C are correct.
Rationale: Tumor suppressor genes, such as p53 and Rb, normally function to halt the cell
cycle, repair DNA, or initiate apoptosis if damage is irreparable. A loss-of-function mutation in
these genes removes the "brakes" on proliferation and can also prevent programmed cell death.
4. Which of the following is an example of a proto-oncogene?
A. p53
B. BRCA1
C. RAS
D. Rb
C. RAS
Rationale: Proto-oncogenes are normal genes that promote cell growth and division. When
mutated, they can become oncogenes, leading to uncontrolled growth. RAS is a classic example.
p53, BRCA1, and Rb are all tumor suppressor genes.
5. During which phase of the cell cycle does DNA replication occur?
A. G1 phase
B. S phase
C. G2 phase
D. M phase
B. S phase
Rationale: The S phase (Synthesis phase) is the part of the cell cycle in which DNA is
replicated, occurring between G1 phase and G2 phase.
,6. A patient with Down syndrome has an increased risk for developing early-onset Alzheimer's
disease. This is an example of:
A. Pleiotropy
B. Genetic heterogeneity
C. Aneuploidy leading to a specific comorbidity
D. Genomic imprinting
C. Aneuploidy leading to a specific comorbidity
Rationale: Down syndrome is caused by aneuploidy (trisomy 21). The extra copy of
chromosome 21 includes the APP gene, which is associated with amyloid-beta production,
explaining the increased risk for early-onset Alzheimer's disease.
7. What is the primary difference between a benign and a malignant tumor?
A. Benign tumors are always smaller than malignant tumors.
B. Malignant tumors are encapsulated, while benign tumors are not.
C. Malignant tumors have the ability to invade and metastasize.
D. Benign tumors grow faster than malignant tumors.
C. Malignant tumors have the ability to invade and metastasize.
Rationale: The defining characteristic of a malignant tumor is its capacity for invasion of
surrounding tissues and metastasis to distant sites. Benign tumors remain localized and
encapsulated.
8. Which of the following genetic principles explains why a person with a single copy of a
mutated BRCA1 gene has a high risk of cancer?
A. Recessive inheritance
B. X-linked inheritance
C. Autosomal dominant inheritance with incomplete penetrance
D. Mitochondrial inheritance
C. Autosomal dominant inheritance with incomplete penetrance
Rationale: A mutation in one copy of a tumor suppressor gene like BRCA1 is often inherited
in an autosomal dominant pattern. This means inheriting one mutated copy is enough to
significantly increase risk, but it doesn't guarantee cancer will develop (incomplete penetrance),
as a "second hit" mutation is often required in the other allele.
9. Marfan syndrome is caused by a defect in which protein?
A. Collagen
B. Fibrillin
, C. Keratin
D. Elastin
B. Fibrillin
Rationale: Marfan syndrome is an autosomal dominant disorder caused by mutations in the
FBN1 gene, which encodes the protein fibrillin-1. This protein is a major component of
microfibrils in the extracellular matrix, providing structural support to connective tissues.
10. Which type of cell is most susceptible to injury from ischemia?
A. Skeletal muscle cell
B. Neurons
C. Fibroblast
D. Adipocyte
B. Neurons
Rationale: Neurons have a very high metabolic rate and an absolute dependence on a
continuous supply of oxygen and glucose. They are the most sensitive cells in the body to
ischemic injury, suffering irreversible damage within minutes.
11. Metaplasia is best defined as:
A. An increase in the number of cells in a tissue.
B. An increase in the size of individual cells.
C. The reversible replacement of one mature cell type by another.
D. A disorderly, pre-cancerous change in cell size and shape.
C. The reversible replacement of one mature cell type by another.
Rationale: Metaplasia is an adaptive response to chronic stress where one differentiated
cell type is replaced by another, often less specialized type (e.g., columnar to squamous in the
smoker's airway).
12. A patient with a known genetic disorder asks about the phenomenon where the severity
of the disease increases in successive generations. This is known as:
A. Anticipation
B. Mosaicism
C. Imprinting
D. Pleiotropy
A. Anticipation
Rationale: Genetic anticipation is a phenomenon where the signs and symptoms of a
genetic disorder become apparent at an earlier age and/or with increased severity as the
