UPSC Prelims 2013 · Question 100 of 99

UPSC Prelims 2013 question on Minerals Muscle Contraction

Consider the following minerals:

1. Calcium
2. Iron
3. Sodium

Which of the minerals given above is/are required by human body for the contraction of muscles?

  1. 1 only
  2. 2 and 3 only
  3. 1 and 3 only
  4. 1, 2 and 3
Show answer

Answer: D. 1, 2 and 3

Calcium plays a direct role in muscle contraction by enabling interaction between muscle proteins. Sodium helps maintain membrane potential and nerve impulse transmission necessary for muscle contraction. Iron supports oxygen transport and energy production in muscle cells, indirectly supporting muscular activity and contraction. Hence, all three minerals are required.

More questions on Biology

All 25 questions on Biology →

← Full 2013 question paper · All Science and Technology questions