Biology Respiration / Gaseous Exchange SZABMU 2024
PMDC Verified Question 3 of 34
Lungs are enclosed in the double membranous sac called:
A
Pericardium
B
Peritoneum
C
Pleura
D
Connective tissue
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Pleura
Concept: Vital thoracic and abdominal organs are protected and lubricated by specialized serous membranes.

Solution:
  • The lungs are wrapped tightly in a double-layered sac known as the pleura.
  • It consists of the visceral pleura (adhered to the lung tissue) and the parietal pleura (lining the chest wall).
  • The tiny space between them holds pleural fluid, which eliminates friction during the continuous expansion and recoiling of breathing.


Why other options are incorrect:
  • Pericardium: The specific double-membranous sac enclosing the heart.
  • Peritoneum: The serous membrane lining the abdominal cavity and its organs.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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