NURS 6501 ADVANCED PATHOPHYSIOLOGY MIDTERM 4
VERSIONS 2026 | 400 Questions with Correct Answers |
Walden University | A Grade | Brand New | Pass Guaranteed -
A+ Graded
VERSION A
Section 1: Cellular Pathophysiology & Genetics
1. A patient has a genetic mutation that prevents the formation of tight junctions
between epithelial cells in the respiratory tract. Which pathophysiological process is
most likely to occur?
A. Increased risk of infection due to loss of selective barrier function
B. Decreased cell proliferation due to loss of contact inhibition
C. Accumulation of toxins within the cell cytoplasm
D. Inability of cells to perform active transport
Answer: A. Increased risk due to loss of selective barrier function [CORRECT]
Rationale: For the midterm, remember that tight junctions form a seal that prevents the
passage of molecules between cells. If these are lost, pathogens can easily invade
underlying tissues. The correct pathophysiological mechanism is a loss of barrier
integrity, not primarily an issue with transport or proliferation.
2. Which statement best describes the difference between hypertrophy and
hyperplasia?
A. Hypertrophy is a decrease in cell size; hyperplasia is an increase in cell size.
B. Hypertrophy is an increase in cell size; hyperplasia is an increase in cell number.
C. Hypertrophy occurs only in labile cells; hyperplasia occurs in permanent cells.
D. Hypertrophy is always pathologic; hyperplasia is always physiologic.
Answer: B. Hypertrophy is an increase in cell size; hyperplasia is an increase in cell
number. [CORRECT]
Rationale: A common midterm trap is confusing the two terms. Hypertrophy refers to
larger cells (think of a bodybuilder’s muscle), while hyperplasia refers to more cells
,(think of the endometrium during the menstrual cycle). Hypertrophy can be physiologic
(exercise) or pathologic (hypertension).
3. A 55-year-old male presents with a history of chronic alcohol abuse. Liver biopsy
reveals hepatomegaly with cytoplasmic vacuoles containing triglycerides. This finding is
most consistent with:
A. Metaplasia
B. Fatty change (Steatosis)
C. Dystrophic calcification
D. Apoptosis
Answer: B. Fatty change (Steatosis) [CORRECT]
Rationale: The correct pathophysiological mechanism here is the accumulation of lipids
within hepatocytes, known as fatty change or steatosis. This is a reversible injury often
seen in the liver due to alcohol toxicity or obesity, distinct from metaplasia (cell type
change) or calcification.
4. During a lecture on cellular injury, the instructor explains "free radical injury." Which
mechanism is primarily responsible for the damage caused by reactive oxygen species
(ROS)?
A. Activation of lysosomal enzymes
B. Lipid peroxidation of cell membranes
C. Depletion of cellular ATP
D. Increased protein synthesis
Answer: B. Lipid peroxidation of cell membranes [CORRECT]
Rationale: Free radicals cause damage by stealing electrons from lipids in the cell
membrane, a process called lipid peroxidation. This destroys the membrane structure.
While ATP depletion occurs in ischemic injury, lipid peroxidation is the hallmark of free
radical damage you need to know for the exam.
5. A patient is diagnosed with Cystic Fibrosis. Which genetic inheritance pattern and
molecular mechanism are associated with this condition?
A. Autosomal dominant; defective tumor suppressor gene
B. Autosomal recessive; defective chloride channel protein
C. X-linked recessive; defective factor VIII production
,D. Mitochondrial inheritance; defective oxidative phosphorylation
Answer: B. Autosomal recessive; defective chloride channel protein [CORRECT]
Rationale: Cystic Fibrosis follows an autosomal recessive inheritance pattern. The key
mechanism to remember is a mutation in the CFTR gene leading to a defective chloride
channel, causing thick mucus secretions, not a tumor suppressor or X-linked issue.
6. A pathologist examines a tissue sample and notes "dystrophic calcification." Which
underlying condition is the most likely cause?
A. Hyperparathyroidism
B. Vitamin D toxicity
C. Atherosclerotic plaques or areas of necrosis
D. Metastatic carcinoma with bone destruction
Answer: C. Atherosclerotic plaques or areas of necrosis [CORRECT]
Rationale: Dystrophic calcification occurs in damaged or necrotic tissue despite normal
serum calcium levels. This is different from metastatic calcification (seen in options A, B,
and D), which happens in normal tissues due to hypercalcemia. Atherosclerotic plaques
are a classic example.
7. Which cellular adaptation is best described as "the replacement of one mature cell
type by another mature cell type"?
A. Dysplasia
B. Metaplasia
C. Anaplasia
D. Hyperplasia
Answer: B. Metaplasia [CORRECT]
Rationale: Metaplasia is a reversible change where one adult cell type is replaced by
another, often to withstand stress (e.g., squamous metaplasia in the trachea of a
smoker). Dysplasia refers to disordered growth, while anaplasia refers to
undifferentiated cells seen in cancer.
8. A neonate is diagnosed with Down Syndrome. Which chromosomal abnormality is
responsible?
A. Monosomy X
B. Trisomy 21
, C. Trisomy 18
D. Trisomy 13
Answer: B. Trisomy 21 [CORRECT]
Rationale: Down Syndrome is caused by the presence of an extra copy of chromosome
21, known as Trisomy 21. Remembering the specific trisomy numbers for common
conditions (21, 18, 13) is essential recall for the midterm.
9. Apoptosis is distinct from necrosis because apoptosis:
A. Results in inflammation and swelling of the cell
B. Is a passive, accidental form of cell death
C. Is an active, programmed process that does not elicit inflammation
D. Affects large groups of cells simultaneously
Answer: C. Is an active, programmed process that does not elicit inflammation
[CORRECT]
Rationale: A common midterm trap is confusing apoptosis with necrosis. Apoptosis is
"programmed cell death"—it is active, energy-dependent, and neat (no inflammation).
Necrosis is messy, accidental, and causes inflammation.
10. Which phase of the cell cycle is the target of many chemotherapy agents,
specifically affecting cells undergoing DNA synthesis?
A. G1 phase
B. S phase
C. G2 phase
D. M phase
Answer: B. S phase [CORRECT]
Rationale: The S phase is when DNA synthesis occurs. Chemotherapy drugs that target
DNA replication (like antimetabolites) work primarily here. M phase agents (like
vincristine) target mitosis, but the question asks specifically about DNA synthesis.
11. A 4-year-old child presents with "bruising" on the buttocks and legs. The mother
reports no history of trauma. The bruises are actually fixed hyperpigmented spots.
These lesions are most likely:
A. Eechymosis due to trauma
B. Mongolian spots (Blue-gray macules)
C. Petechiae due to low platelets
VERSIONS 2026 | 400 Questions with Correct Answers |
Walden University | A Grade | Brand New | Pass Guaranteed -
A+ Graded
VERSION A
Section 1: Cellular Pathophysiology & Genetics
1. A patient has a genetic mutation that prevents the formation of tight junctions
between epithelial cells in the respiratory tract. Which pathophysiological process is
most likely to occur?
A. Increased risk of infection due to loss of selective barrier function
B. Decreased cell proliferation due to loss of contact inhibition
C. Accumulation of toxins within the cell cytoplasm
D. Inability of cells to perform active transport
Answer: A. Increased risk due to loss of selective barrier function [CORRECT]
Rationale: For the midterm, remember that tight junctions form a seal that prevents the
passage of molecules between cells. If these are lost, pathogens can easily invade
underlying tissues. The correct pathophysiological mechanism is a loss of barrier
integrity, not primarily an issue with transport or proliferation.
2. Which statement best describes the difference between hypertrophy and
hyperplasia?
A. Hypertrophy is a decrease in cell size; hyperplasia is an increase in cell size.
B. Hypertrophy is an increase in cell size; hyperplasia is an increase in cell number.
C. Hypertrophy occurs only in labile cells; hyperplasia occurs in permanent cells.
D. Hypertrophy is always pathologic; hyperplasia is always physiologic.
Answer: B. Hypertrophy is an increase in cell size; hyperplasia is an increase in cell
number. [CORRECT]
Rationale: A common midterm trap is confusing the two terms. Hypertrophy refers to
larger cells (think of a bodybuilder’s muscle), while hyperplasia refers to more cells
,(think of the endometrium during the menstrual cycle). Hypertrophy can be physiologic
(exercise) or pathologic (hypertension).
3. A 55-year-old male presents with a history of chronic alcohol abuse. Liver biopsy
reveals hepatomegaly with cytoplasmic vacuoles containing triglycerides. This finding is
most consistent with:
A. Metaplasia
B. Fatty change (Steatosis)
C. Dystrophic calcification
D. Apoptosis
Answer: B. Fatty change (Steatosis) [CORRECT]
Rationale: The correct pathophysiological mechanism here is the accumulation of lipids
within hepatocytes, known as fatty change or steatosis. This is a reversible injury often
seen in the liver due to alcohol toxicity or obesity, distinct from metaplasia (cell type
change) or calcification.
4. During a lecture on cellular injury, the instructor explains "free radical injury." Which
mechanism is primarily responsible for the damage caused by reactive oxygen species
(ROS)?
A. Activation of lysosomal enzymes
B. Lipid peroxidation of cell membranes
C. Depletion of cellular ATP
D. Increased protein synthesis
Answer: B. Lipid peroxidation of cell membranes [CORRECT]
Rationale: Free radicals cause damage by stealing electrons from lipids in the cell
membrane, a process called lipid peroxidation. This destroys the membrane structure.
While ATP depletion occurs in ischemic injury, lipid peroxidation is the hallmark of free
radical damage you need to know for the exam.
5. A patient is diagnosed with Cystic Fibrosis. Which genetic inheritance pattern and
molecular mechanism are associated with this condition?
A. Autosomal dominant; defective tumor suppressor gene
B. Autosomal recessive; defective chloride channel protein
C. X-linked recessive; defective factor VIII production
,D. Mitochondrial inheritance; defective oxidative phosphorylation
Answer: B. Autosomal recessive; defective chloride channel protein [CORRECT]
Rationale: Cystic Fibrosis follows an autosomal recessive inheritance pattern. The key
mechanism to remember is a mutation in the CFTR gene leading to a defective chloride
channel, causing thick mucus secretions, not a tumor suppressor or X-linked issue.
6. A pathologist examines a tissue sample and notes "dystrophic calcification." Which
underlying condition is the most likely cause?
A. Hyperparathyroidism
B. Vitamin D toxicity
C. Atherosclerotic plaques or areas of necrosis
D. Metastatic carcinoma with bone destruction
Answer: C. Atherosclerotic plaques or areas of necrosis [CORRECT]
Rationale: Dystrophic calcification occurs in damaged or necrotic tissue despite normal
serum calcium levels. This is different from metastatic calcification (seen in options A, B,
and D), which happens in normal tissues due to hypercalcemia. Atherosclerotic plaques
are a classic example.
7. Which cellular adaptation is best described as "the replacement of one mature cell
type by another mature cell type"?
A. Dysplasia
B. Metaplasia
C. Anaplasia
D. Hyperplasia
Answer: B. Metaplasia [CORRECT]
Rationale: Metaplasia is a reversible change where one adult cell type is replaced by
another, often to withstand stress (e.g., squamous metaplasia in the trachea of a
smoker). Dysplasia refers to disordered growth, while anaplasia refers to
undifferentiated cells seen in cancer.
8. A neonate is diagnosed with Down Syndrome. Which chromosomal abnormality is
responsible?
A. Monosomy X
B. Trisomy 21
, C. Trisomy 18
D. Trisomy 13
Answer: B. Trisomy 21 [CORRECT]
Rationale: Down Syndrome is caused by the presence of an extra copy of chromosome
21, known as Trisomy 21. Remembering the specific trisomy numbers for common
conditions (21, 18, 13) is essential recall for the midterm.
9. Apoptosis is distinct from necrosis because apoptosis:
A. Results in inflammation and swelling of the cell
B. Is a passive, accidental form of cell death
C. Is an active, programmed process that does not elicit inflammation
D. Affects large groups of cells simultaneously
Answer: C. Is an active, programmed process that does not elicit inflammation
[CORRECT]
Rationale: A common midterm trap is confusing apoptosis with necrosis. Apoptosis is
"programmed cell death"—it is active, energy-dependent, and neat (no inflammation).
Necrosis is messy, accidental, and causes inflammation.
10. Which phase of the cell cycle is the target of many chemotherapy agents,
specifically affecting cells undergoing DNA synthesis?
A. G1 phase
B. S phase
C. G2 phase
D. M phase
Answer: B. S phase [CORRECT]
Rationale: The S phase is when DNA synthesis occurs. Chemotherapy drugs that target
DNA replication (like antimetabolites) work primarily here. M phase agents (like
vincristine) target mitosis, but the question asks specifically about DNA synthesis.
11. A 4-year-old child presents with "bruising" on the buttocks and legs. The mother
reports no history of trauma. The bruises are actually fixed hyperpigmented spots.
These lesions are most likely:
A. Eechymosis due to trauma
B. Mongolian spots (Blue-gray macules)
C. Petechiae due to low platelets
