The GATE Grind

GATE 2021 BM – Question 21

Mammalian Cell Biology, Human Anatomy and Physiology · Gastrointestinal System and Homeostasis · 1 mark · Multiple choice

Which range describes blood pH in a healthy human?

  1. 7.10–8.10
  2. 6.95–7.05
  3. 7.15–7.20
  4. 7.35–7.45

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Correct answer: (D) 7.35–7.45

Explanation

The conventional normal arterial blood-pH interval is 7.35–7.45, D, reflecting tightly regulated acid–base balance. The other proposed intervals are either too broad or shifted toward acidity. This question tests the physiological reference interval.

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