HCR 240 Pathophysiology Final Exam: Complete 300-Question Test Bank with Actual Questions,
Correct Answers, and Detailed Rationales for Every Question — Your A+ Study Guide.
Questions 1–300 with Answers & Detailed Rationales
Section 1: Cellular Adaptation, Injury, and Neoplasia (Questions 1–40)
1. A 55-year-old male has swelling of the feet. Which of the following aided in the development of
swelling?
A) Decreased capillary hydrostatic pressure
B) Increased plasma proteins
C) Increased lymphatic flow
D) Sodium and water retention
Answer: D
Rationale: Edema occurs when fluid moves from the vascular space into the interstitium. Sodium and
water retention expands blood volume, increasing capillary hydrostatic pressure, which forces fluid out.
Decreased hydrostatic pressure (A) reduces edema. Increased plasma proteins (B) increase oncotic
pressure, pulling fluid into vessels. Increased lymphatic flow (C) helps remove interstitial fluid.
2. A patient had a heart attack leading to progressive cell injury causing cell death with severe cell
swelling and breakdown of organelles. What term defines this process?
A) Apoptosis
B) Autophagy
C) Metaplasia
D) Necrosis
Answer: D
Rationale: Necrosis is pathological cell death caused by injury such as ischemia from a heart attack. It
is characterized by cell swelling, organelle breakdown, membrane rupture, and inflammation.
Apoptosis (A) is programmed, neat, and non-inflammatory. Autophagy (B) is lysosomal recycling.
Metaplasia (C) is reversible change of cell type.
3. Which term describes the reduction in cell size as a result of decreased workload or stimulus?
A) Hypertrophy
B) Hyperplasia
C) Dysplasia
D) Atrophy
Answer: D
Rationale: Atrophy is a decrease in cell size and function due to disuse, denervation, ischemia,
,hormonal loss, or malnutrition. Hypertrophy (A) is increased cell size. Hyperplasia (B) is increased cell
number. Dysplasia (C) is abnormal cell growth.
4. A 60-year-old smoker has a lung mass. Biopsy shows anaplasia. What does this indicate?
A) Benign tumor
B) Well-differentiated cells
C) Malignant potential
D) No metastasis risk
Answer: C
Rationale: Anaplasia (lack of differentiation) is a hallmark of malignancy. Anaplastic cells are primitive,
have large hyperchromatic nuclei, and exhibit high mitotic activity. This indicates high malignant
potential, rapid growth, and high risk of metastasis. Benign tumors (A) are well-differentiated. Well-
differentiated cells (B) indicate low-grade malignancy. Anaplastic tumors have high metastasis risk (D
false).
5. A 45-year-old with chronic GERD has Barrett esophagus. This is an example of:
A) Hyperplasia
B) Metaplasia
C) Dysplasia
D) Anaplasia
Answer: B
Rationale: Barrett esophagus is a classic example of metaplasia: normal stratified squamous epithelium
of the lower esophagus is replaced by metaplastic columnar epithelium as an adaptive response to
chronic acid reflux. This change predisposes to adenocarcinoma. Hyperplasia (A) is increased cell
number. Dysplasia (C) is disordered growth. Anaplasia (D) is severe loss of differentiation.
6. Which of the following is a reversible cell injury?
A) Coagulative necrosis
B) Fatty change (steatosis)
C) Caseous necrosis
D) Gangrenous necrosis
Answer: B
Rationale: Fatty change (steatosis) is accumulation of lipid droplets in the cytoplasm, typically in the
liver, heart, or kidney. It is reversible if the injurious agent (alcohol, hypoxia, toxins) is removed. All
necrosis types (A, C, D) are irreversible.
7. A 70-year-old has an enlarged prostate. Microscopy shows increased numbers of normal-
appearing glandular cells. This is:
A) Hypertrophy
B) Hyperplasia
C) Metaplasia
D) Dysplasia
Answer: B
Rationale: Benign prostatic hyperplasia (BPH) is an increase in the number of normal-appearing
,glandular and stromal cells. Hypertrophy (A) is increased cell size. Metaplasia (C) is cell type change.
Dysplasia (D) is abnormal growth.
8. Which of the following best differentiates benign from malignant tumors?
A) Size of the tumor
B) Rate of growth
C) Metastasis
D) Pain on palpation
Answer: C
Rationale: Metastasis (spread to distant sites via blood or lymph) is the definitive feature
distinguishing malignant from benign tumors. Benign tumors may grow rapidly (B) or become large
(A), but they remain localized. Pain (D) is not reliable.
9. A 30-year-old female has a breast lump that is mobile, smooth, and non-invasive. Most likely
diagnosis:
A) Fibroadenoma (benign)
B) Invasive ductal carcinoma
C) Inflammatory breast cancer
D) Paget disease of the breast
Answer: A
Rationale: Fibroadenoma is the most common benign breast tumor in young women. It is typically
mobile, smooth, well-circumscribed, and non-invasive. Malignant tumors (B, C, D) are more likely fixed,
irregular, and invasive.
10. A patient with chronic hepatitis B develops liver cancer. The hepatitis B virus is a(n):
A) Tumor suppressor gene
B) Oncogene
C) Carcinogen
D) Proto-oncogene
Answer: C
Rationale: Hepatitis B virus (HBV) is a biological carcinogen. It causes chronic inflammation and
integrates its DNA into the host genome, leading to mutations and hepatocellular carcinoma. Tumor
suppressors (A) prevent cancer. Oncogenes (B) are mutated proto-oncogenes (D) that drive cancer.
11. Which of the following is a characteristic of malignant cells?
A) Cohesive adherence
B) Contact inhibition
C) Loss of differentiation
D) Slow mitotic rate
Answer: C
Rationale: Malignant cells are anaplastic (loss of differentiation). They also lose cohesiveness (A), lack
contact inhibition (B), and have high (not slow) mitotic rates (D).
, 12. A tumor suppressor gene that is mutated in many cancers is:
A) RAS
B) MYC
C) TP53
D) SRC
Answer: C
Rationale: TP53 (p53) is a tumor suppressor gene encoding a protein regulating cell cycle arrest, DNA
repair, and apoptosis. It is mutated in over 50% of human cancers. RAS (A), MYC (B), and SRC (D) are
proto-oncogenes.
13. A 65-year-old smoker has a lung mass with keratin pearls on biopsy. This is most likely:
A) Small cell carcinoma
B) Squamous cell carcinoma
C) Adenocarcinoma
D) Large cell carcinoma
Answer: B
Rationale: Squamous cell carcinoma of the lung (strongly associated with smoking) characteristically
shows keratin pearls (whorls of squamous cells) and intercellular bridges. Small cell carcinoma (A) has
small round cells. Adenocarcinoma (C) shows gland formation. Large cell carcinoma (D) has large
anaplastic cells.
14. Which term refers to programmed cell death without inflammation?
A) Necrosis
B) Pyroptosis
C) Apoptosis
D) Oncosis
Answer: C
Rationale: Apoptosis is energy-dependent, tightly regulated programmed cell death characterized by
cell shrinkage, nuclear fragmentation, and formation of apoptotic bodies that are phagocytosed
without inflammation. Necrosis (A) and oncosis (D) cause inflammation. Pyroptosis (B) is pro-
inflammatory programmed death.
15. A 50-year-old with BRCA1 mutation has high risk for:
A) Lung cancer
B) Colon cancer
C) Breast and ovarian cancer
D) Prostate cancer
Answer: C
Rationale: BRCA1 and BRCA2 are DNA repair genes. Germline mutations significantly increase risk of
breast cancer (up to 80% lifetime) and ovarian cancer (up to 40%). They also increase risk for
pancreatic and prostate cancer, but breast and ovarian are most prominent.
16. A 40-year-old has cervical dysplasia on Pap smear. This means:
A) Invasive cancer is present
Correct Answers, and Detailed Rationales for Every Question — Your A+ Study Guide.
Questions 1–300 with Answers & Detailed Rationales
Section 1: Cellular Adaptation, Injury, and Neoplasia (Questions 1–40)
1. A 55-year-old male has swelling of the feet. Which of the following aided in the development of
swelling?
A) Decreased capillary hydrostatic pressure
B) Increased plasma proteins
C) Increased lymphatic flow
D) Sodium and water retention
Answer: D
Rationale: Edema occurs when fluid moves from the vascular space into the interstitium. Sodium and
water retention expands blood volume, increasing capillary hydrostatic pressure, which forces fluid out.
Decreased hydrostatic pressure (A) reduces edema. Increased plasma proteins (B) increase oncotic
pressure, pulling fluid into vessels. Increased lymphatic flow (C) helps remove interstitial fluid.
2. A patient had a heart attack leading to progressive cell injury causing cell death with severe cell
swelling and breakdown of organelles. What term defines this process?
A) Apoptosis
B) Autophagy
C) Metaplasia
D) Necrosis
Answer: D
Rationale: Necrosis is pathological cell death caused by injury such as ischemia from a heart attack. It
is characterized by cell swelling, organelle breakdown, membrane rupture, and inflammation.
Apoptosis (A) is programmed, neat, and non-inflammatory. Autophagy (B) is lysosomal recycling.
Metaplasia (C) is reversible change of cell type.
3. Which term describes the reduction in cell size as a result of decreased workload or stimulus?
A) Hypertrophy
B) Hyperplasia
C) Dysplasia
D) Atrophy
Answer: D
Rationale: Atrophy is a decrease in cell size and function due to disuse, denervation, ischemia,
,hormonal loss, or malnutrition. Hypertrophy (A) is increased cell size. Hyperplasia (B) is increased cell
number. Dysplasia (C) is abnormal cell growth.
4. A 60-year-old smoker has a lung mass. Biopsy shows anaplasia. What does this indicate?
A) Benign tumor
B) Well-differentiated cells
C) Malignant potential
D) No metastasis risk
Answer: C
Rationale: Anaplasia (lack of differentiation) is a hallmark of malignancy. Anaplastic cells are primitive,
have large hyperchromatic nuclei, and exhibit high mitotic activity. This indicates high malignant
potential, rapid growth, and high risk of metastasis. Benign tumors (A) are well-differentiated. Well-
differentiated cells (B) indicate low-grade malignancy. Anaplastic tumors have high metastasis risk (D
false).
5. A 45-year-old with chronic GERD has Barrett esophagus. This is an example of:
A) Hyperplasia
B) Metaplasia
C) Dysplasia
D) Anaplasia
Answer: B
Rationale: Barrett esophagus is a classic example of metaplasia: normal stratified squamous epithelium
of the lower esophagus is replaced by metaplastic columnar epithelium as an adaptive response to
chronic acid reflux. This change predisposes to adenocarcinoma. Hyperplasia (A) is increased cell
number. Dysplasia (C) is disordered growth. Anaplasia (D) is severe loss of differentiation.
6. Which of the following is a reversible cell injury?
A) Coagulative necrosis
B) Fatty change (steatosis)
C) Caseous necrosis
D) Gangrenous necrosis
Answer: B
Rationale: Fatty change (steatosis) is accumulation of lipid droplets in the cytoplasm, typically in the
liver, heart, or kidney. It is reversible if the injurious agent (alcohol, hypoxia, toxins) is removed. All
necrosis types (A, C, D) are irreversible.
7. A 70-year-old has an enlarged prostate. Microscopy shows increased numbers of normal-
appearing glandular cells. This is:
A) Hypertrophy
B) Hyperplasia
C) Metaplasia
D) Dysplasia
Answer: B
Rationale: Benign prostatic hyperplasia (BPH) is an increase in the number of normal-appearing
,glandular and stromal cells. Hypertrophy (A) is increased cell size. Metaplasia (C) is cell type change.
Dysplasia (D) is abnormal growth.
8. Which of the following best differentiates benign from malignant tumors?
A) Size of the tumor
B) Rate of growth
C) Metastasis
D) Pain on palpation
Answer: C
Rationale: Metastasis (spread to distant sites via blood or lymph) is the definitive feature
distinguishing malignant from benign tumors. Benign tumors may grow rapidly (B) or become large
(A), but they remain localized. Pain (D) is not reliable.
9. A 30-year-old female has a breast lump that is mobile, smooth, and non-invasive. Most likely
diagnosis:
A) Fibroadenoma (benign)
B) Invasive ductal carcinoma
C) Inflammatory breast cancer
D) Paget disease of the breast
Answer: A
Rationale: Fibroadenoma is the most common benign breast tumor in young women. It is typically
mobile, smooth, well-circumscribed, and non-invasive. Malignant tumors (B, C, D) are more likely fixed,
irregular, and invasive.
10. A patient with chronic hepatitis B develops liver cancer. The hepatitis B virus is a(n):
A) Tumor suppressor gene
B) Oncogene
C) Carcinogen
D) Proto-oncogene
Answer: C
Rationale: Hepatitis B virus (HBV) is a biological carcinogen. It causes chronic inflammation and
integrates its DNA into the host genome, leading to mutations and hepatocellular carcinoma. Tumor
suppressors (A) prevent cancer. Oncogenes (B) are mutated proto-oncogenes (D) that drive cancer.
11. Which of the following is a characteristic of malignant cells?
A) Cohesive adherence
B) Contact inhibition
C) Loss of differentiation
D) Slow mitotic rate
Answer: C
Rationale: Malignant cells are anaplastic (loss of differentiation). They also lose cohesiveness (A), lack
contact inhibition (B), and have high (not slow) mitotic rates (D).
, 12. A tumor suppressor gene that is mutated in many cancers is:
A) RAS
B) MYC
C) TP53
D) SRC
Answer: C
Rationale: TP53 (p53) is a tumor suppressor gene encoding a protein regulating cell cycle arrest, DNA
repair, and apoptosis. It is mutated in over 50% of human cancers. RAS (A), MYC (B), and SRC (D) are
proto-oncogenes.
13. A 65-year-old smoker has a lung mass with keratin pearls on biopsy. This is most likely:
A) Small cell carcinoma
B) Squamous cell carcinoma
C) Adenocarcinoma
D) Large cell carcinoma
Answer: B
Rationale: Squamous cell carcinoma of the lung (strongly associated with smoking) characteristically
shows keratin pearls (whorls of squamous cells) and intercellular bridges. Small cell carcinoma (A) has
small round cells. Adenocarcinoma (C) shows gland formation. Large cell carcinoma (D) has large
anaplastic cells.
14. Which term refers to programmed cell death without inflammation?
A) Necrosis
B) Pyroptosis
C) Apoptosis
D) Oncosis
Answer: C
Rationale: Apoptosis is energy-dependent, tightly regulated programmed cell death characterized by
cell shrinkage, nuclear fragmentation, and formation of apoptotic bodies that are phagocytosed
without inflammation. Necrosis (A) and oncosis (D) cause inflammation. Pyroptosis (B) is pro-
inflammatory programmed death.
15. A 50-year-old with BRCA1 mutation has high risk for:
A) Lung cancer
B) Colon cancer
C) Breast and ovarian cancer
D) Prostate cancer
Answer: C
Rationale: BRCA1 and BRCA2 are DNA repair genes. Germline mutations significantly increase risk of
breast cancer (up to 80% lifetime) and ovarian cancer (up to 40%). They also increase risk for
pancreatic and prostate cancer, but breast and ovarian are most prominent.
16. A 40-year-old has cervical dysplasia on Pap smear. This means:
A) Invasive cancer is present
