Chemistry Equilibrium SZABMU 2024
PMDC Verified Question 11 of 102
The pH of human blood is
A
7.35 to 7.45
B
8.35 to 8.45
C
6.35 to 7.45
D
5.57 to 6.57
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: 7.35 to 7.45
Concept:

Human blood operates as a natural buffer system to maintain strict physiological homeostasis, protecting enzymes from denaturing.

Solution:

  • The optimal blood pH for enzyme function, cellular respiration, and oxygen transport is tightly controlled between 7.35 and 7.45.


  • This is a slightly alkaline (basic) state.


  • It is maintained primarily by the carbonic acid-bicarbonate buffer system in the plasma.


Why other options are incorrect:

Deviations outside this extremely narrow range rapidly lead to acidosis (below 7.35) or alkalosis (above 7.45), both of which cause death.

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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