Biology Circulation / Transport NUMS 2024
PMDC Verified Question 6 of 54
Weakened papillary muscles of right ventricle would result in constant back flow of blood into:
A
Right atrium
B
Left ventricle
C
Right ventricle
D
Left atrium
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Right atrium
Concept:

Papillary muscles anchor the AV valves to prevent prolapse during ventricular systole.

Formula:

None

Solution:

  • The papillary muscles of the right ventricle are attached to the tricuspid valve via chordae tendineae.


  • If these muscles weaken or rupture, the intense pressure generated during right ventricular contraction will blow the tricuspid valve flaps backward (prolapse).


  • This valve failure allows blood to continuously regurgitate (back flow) upwards into the chamber it just came from: the right atrium.


Why other options are incorrect:

  • The right ventricle is entirely isolated from the left side of the heart, so it would not affect the left atrium or left ventricle directly.

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.

Previous Question All Circulation / Transport MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App