Paper I — 2024 December (Supplementary) (2019 Scheme) — Qxii

Paper I

2024 December (Supplementary) (2019 Scheme) · 100 marks · 180 min

Question

(A): Type-1 hypersensitivity reaction causes laryngeal edema (R): Histamine causes increased vascular permeability and pain

• a) Both A & R are correct and R is the reason for A
• b) Both A & R are correct but R is not reason for A
• c) A is correct R is incorrect
• d) A is incorrect R is correct (PTO)

Qxii1 marksMCQs★✓

Answer

Correct answer: a) Both A & R are correct and R is the reason for A

Both statements are correct, and R is the reason for A. In Type I (IgE-mediated) hypersensitivity, mast cell degranulation releases histamine, which increases vascular permeability, causing fluid leakage into the interstitial tissue; when this occurs in the laryngeal mucosa (as in anaphylaxis), it produces laryngeal oedema, a life-threatening airway emergency.

Related Concepts

1. 1Oedema

Other Years Asked

1. 1mt regular.2025 March (Supplementary (SAY)) (2019 Scheme)Essay · 10 marks
2. 2Left sided heart failure2022 February (2019 Scheme)Short Answer · 4 marks
3. 3Name one cause for increase in hydrostatic pressure leading to edema.2023 January (Supplementary) (2019 Scheme)1 mark