General Pathology Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for General Pathology. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
General Pathology Indian Medical PG Question 1: What is the correct order of the normal phases of wound healing?
- A. Haemostatic phase → Inflammatory phase → Proliferative phase → Remodelling phase (Correct Answer)
- B. Proliferative phase → Haemostatic phase → Inflammatory phase → Remodelling phase
- C. Remodelling phase → Proliferative phase → Destructive phase → Inflammatory phase
- D. Destructive phase → Proliferative phase → Remodelling phase → Inflammatory phase
General Pathology Explanation: ***Haemostatic phase → Inflammatory phase → Proliferative phase → Remodelling phase***
- This sequence accurately describes the well-established biological progression of **wound healing**, starting with immediate injury response and leading to tissue maturation [1], [2].
- Each phase builds upon the previous one, ensuring proper clot formation, immune response, tissue repair, and final strengthening of the wound [1], [2].
*Proliferative phase → Haemostatic phase → Inflammatory phase → Remodelling phase*
- This order is incorrect because the **proliferative phase** occurs much later than the initial haemostatic and inflammatory responses [1].
- **Haemostasis** must occur first to stop bleeding before subsequent healing processes can begin effectively [2].
*Remodelling phase → Proliferative phase → Destructive phase → Inflammatory phase*
- This option is incorrect as the **remodelling phase** is the final stage of wound healing, not the initial one [1].
- The term "**destructive phase**" is not a standard physiological phase in normal wound healing.
*Destructive phase → Proliferative phase → Remodelling phase → Inflammatory phase*
- This sequence is incorrect because, similar to the previous option, "**destructive phase**" is not a recognized normal phase of wound healing.
- The **inflammatory phase** occurs early in the process, not as the final stage [1].
**References:**
[1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Inflammation and Repair, pp. 117-119.
[2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. (Basic Pathology) introduces the student to key general principles of pathology, both as a medical science and as a clinical activity with a vital role in patient care. Part 2 (Disease Mechanisms) provides fundamental knowledge about the cellular and molecular processes involved in diseases, providing the rationale for their treatment. Part 3 (Systematic Pathology) deals in detail with specific diseases, with emphasis on the clinically important aspects., pp. 105-108.
General Pathology Indian Medical PG Question 2: Which is NOT a feature of chronic inflammation?
- A. Mononuclear cells
- B. Neutrophil predominance (Correct Answer)
- C. Fibrosis
- D. Granulation tissue
General Pathology Explanation: ***Neutrophil predominance***
- **Neutrophil predominance** is characteristic of **acute inflammation**, where these cells are among the first responders to injury or infection [1].
- In chronic inflammation, neutrophils are typically present in much smaller numbers compared to mononuclear cells, or their presence indicates an acute exacerbation [3].
*Mononuclear cells*
- **Mononuclear cells**, such as **macrophages**, **lymphocytes**, and **plasma cells**, are the hallmark cellular infiltrates of chronic inflammation [1].
- These cells are responsible for sustained immune responses, tissue destruction, and repair processes [2].
*Fibrosis*
- **Fibrosis**, or the deposition of **collagen** by fibroblasts, is a common outcome of chronic inflammation as the body attempts to repair ongoing tissue damage [3].
- It leads to **scarring** and functional impairment of affected organs [4].
*Granulation tissue*
- **Granulation tissue** is an early phase of **tissue repair** during chronic inflammation, characterized by the proliferation of **fibroblasts** and new **blood vessels (angiogenesis)** [5].
- It represents the body's effort to fill tissue defects and prepare for eventual fibrous scar formation [5].
**References:**
[1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. (Basic Pathology) introduces the student to key general principles of pathology, both as a medical science and as a clinical activity with a vital role in patient care. Part 2 (Disease Mechanisms) provides fundamental knowledge about the cellular and molecular processes involved in diseases, providing the rationale for their treatment. Part 3 (Systematic Pathology) deals in detail with specific diseases, with emphasis on the clinically important aspects., pp. 195-196.
[2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Inflammation and Repair, pp. 107-109.
[3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. (Basic Pathology) introduces the student to key general principles of pathology, both as a medical science and as a clinical activity with a vital role in patient care. Part 2 (Disease Mechanisms) provides fundamental knowledge about the cellular and molecular processes involved in diseases, providing the rationale for their treatment. Part 3 (Systematic Pathology) deals in detail with specific diseases, with emphasis on the clinically important aspects., pp. 196-197.
[4] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. (Basic Pathology) introduces the student to key general principles of pathology, both as a medical science and as a clinical activity with a vital role in patient care. Part 2 (Disease Mechanisms) provides fundamental knowledge about the cellular and molecular processes involved in diseases, providing the rationale for their treatment. Part 3 (Systematic Pathology) deals in detail with specific diseases, with emphasis on the clinically important aspects., pp. 200-202.
[5] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. (Basic Pathology) introduces the student to key general principles of pathology, both as a medical science and as a clinical activity with a vital role in patient care. Part 2 (Disease Mechanisms) provides fundamental knowledge about the cellular and molecular processes involved in diseases, providing the rationale for their treatment. Part 3 (Systematic Pathology) deals in detail with specific diseases, with emphasis on the clinically important aspects., pp. 194-195.
General Pathology Indian Medical PG Question 3: Which of the following is an example of programmed cell death?
- A. Apoptosis (Correct Answer)
- B. Cytolysis
- C. Necrosis
- D. Autophagy
General Pathology Explanation: ***Apoptosis***
- Apoptosis is a form of **programmed cell death** [1], essential for normal cellular turnover and development.
- It is characterized by cellular shrinkage, chromatin condensation, and membrane blebbing, without provoking an inflammatory response [4].
*Cytolysis*
- Cytolysis refers to the **destruction of cells by external agents**, such as toxins or pathogens, leading to membrane rupture.
- It typically results in **inflammation** and is not a programmed or controlled process like apoptosis.
*Necrosis*
- Necrosis is an **uncontrolled form of cell death** resulting from acute cellular injury, leading to inflammation and damage to surrounding tissues.
- Unlike apoptosis, necrosis involves rapid cell swelling and bursting of cell membranes, causing inflammation. However, some forms of necrosis can be programmed, such as necroptosis [2][3].
*Proptosis*
- Proptosis refers to **eye bulging** (exophthalmos), often due to thyroid disease or certain tumors, and is not related to cell death.
- It does not involve a process of cell death but rather anatomical displacement of the eyeball.
**References:**
[1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Cellular Responses to Stress and Toxic Insults: Adaptation, Injury, and Death, pp. 63-64.
[2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Cellular Responses to Stress and Toxic Insults: Adaptation, Injury, and Death, p. 71.
[3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Cellular Responses to Stress and Toxic Insults: Adaptation, Injury, and Death, pp. 69-71.
[4] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Cellular Responses to Stress and Toxic Insults: Adaptation, Injury, and Death, pp. 67-69.
General Pathology Indian Medical PG Question 4: What is the histopathological finding 12 hours after ischemic injury to heart?
- A. Neocapillary invasion of myocytes
- B. Hyper-eosinophilia of myocytes (Correct Answer)
- C. Karyorrhexis of myocytes
- D. Coagulation necrosis of myocytes
General Pathology Explanation: ***Hyper-eosinophilia of myocytes***
- Within **4-12 hours** of myocardial ischemia, the most characteristic histological finding is the development of **hypereosinophilia** in the sarcoplasm of myocardial cells [1].
- This is due to the loss of **glycogen** and an increase in **cytoplasmic protein binding** to eosin, indicating early irreversible cell injury [1], [2].
*Neocapillary invasion of myocytes*
- **Neocapillary invasion** is a feature of **healing** and **repair** processes, usually observed much later, typically days to weeks after the initial injury, to facilitate scar formation [1].
- This process involves the growth of **new blood vessels** into the damaged tissue.
*Karyorrhexis of myocytes*
- **Karyorrhexis**, the fragmentation of the cell nucleus, is a later stage of necrosis, usually becoming apparent **12-24 hours post-infarction** [1].
- In the initial 12 hours, nuclear changes like **pyknosis** (nuclear shrinkage and increased basophilia) might be observed, but karyorrhexis is not prominent [1].
*Coagulation necrosis of myocytes*
- While myocardial infarction is characterized by **coagulation necrosis**, the classic histological signs of full-blown coagulation necrosis, such as loss of striations and nuclear changes, become prominent at **12-24 hours and beyond** [1].
- In the first 12 hours, **hypereosinophilia** is the primary early indicator of this necrotic process, preceding the more overt classical features [1].
**References:**
[1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Heart, p. 552.
[2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Heart, pp. 548-550.
General Pathology Indian Medical PG Question 5: Which of the following ions is important in irreversible cell injury?
- A. Sodium
- B. Chloride
- C. Calcium (Correct Answer)
- D. Potassium
General Pathology Explanation: ***Calcium***
- An increase in intracellular **calcium** concentration is a critical event in irreversible cell injury, activating various destructive enzymes like **phospholipases**, **proteases**, **endonucleases**, and ATPases [1].
- This influx of calcium can occur due to mitochondrial dysfunction (leading to impaired calcium sequestration) or damage to the plasma membrane [1].
*Sodium*
- While important for maintaining **osmotic balance** and cell volume, dysregulation of sodium primarily contributes to **cellular swelling** (hydropic change), which is an early and often reversible sign of cell injury [1].
- Increased intracellular sodium typically leads to water influx, but its direct role in irreversible damage is secondary to calcium.
*Chloride*
- Changes in chloride ion distribution are often secondary to sodium dysregulation and play a role in maintaining **charge neutrality** and osmotic balance across the cell membrane.
- It is not directly implicated as a primary mediator of the **enzyme activation cascade** that leads to irreversible cell damage.
*Potassium*
- **Potassium** is the major intracellular cation; its leakage out of the cell is a consequence of cell membrane damage, indicating loss of membrane integrity.
- While significant **potassium efflux** is a sign of severe injury, it is not the initiator of the irreversible damage pathway, unlike calcium.
**References:**
[1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Cellular Responses to Stress and Toxic Insults: Adaptation, Injury, and Death, pp. 57-62.
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