2007 General Studies, all questions

UPSC Prelims 2007 · General Studies

Question 113: Science and Technology

In the human body which one of the following hormones regulates blood calcium and phosphate?

aGlucagon
bGrowth hormone
cParathyroid hormone
dThyroxin

AnswerThe answer is (c).

Parathyroid hormone, from the four parathyroid glands behind the thyroid, raises the level of calcium in the blood by drawing it from bone and increasing absorption in the gut and kidney, and it lowers blood phosphate by increasing its loss in urine. Glucagon controls blood sugar, growth hormone controls growth, and thyroxine controls metabolism.

Why each option is right or wrong
  • (a) Glucagon raises blood sugar.
  • (b) Growth hormone promotes growth.
  • (c) Correct: parathyroid hormone regulates blood calcium and phosphate.
  • (d) Thyroxine regulates metabolic rate.

Explanation: written by UPSC Grade, not by UPSC.

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Source: UPSC, Civil Services (Preliminary) Examination 2007, General Studies. UPSC's own paper isn't online; the words are from a published compilation. The paper on upsc.gov.in.