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Topic Homeostasis
Asked 5 times across 3 UPSC exams over 40 years (1981–2021), peaking in 1981.
Key insights
- Most tested in CSE — 3 of 5 PYQs
- Most asked in 1981
- Recurs across 5 years (1981–2021)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CSE 1981 → CDS 2018 → GEO 2021
How the concept evolved
Long-running — most appearances (3 of 5) predate 2016, and it still returns.
Related concepts
Ideas UPSC tests alongside this one — keep exploring.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
GEO2021
pH of blood is:
- A 7.0
- B 6.8
- C 7.4
- D 6.4
Answer key not yet available (pending official release)
Science & Technology › Biology & Health
CDS2018
Which one of the following elements is involved in the control of water content of the blood?
- A Potassium ✓
- B Lithium
- C Rubidium
- D Caesium
✓ Correct answer: (A)
Science & Technology › Biology & Health
CSE1994
Even though an animal is fed with carbohydrate rich diet, its blood sugar concentration tends to remain constant. This is on account of the fact that in the case of an animal
- A hormones of pituitary glands control metabolic process
- B hormones of pancreas cause such a condition ✓
- C blood sugar is readily absorbed by liver
- D glucose undergoes autolysis
✓ Correct answer: (B)
Science & Technology › Biology & Health
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