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

Explanation

Option (d) is correct

• Calcium, iron, and sodium are all essential for muscle contraction. Calcium directly facilitates the interaction between actin and myosin filaments, enabling the contraction process.
• Iron is critical as a component of haemoglobin and myoglobin, which deliver oxygen to muscles for energy production needed for contraction.
• Sodium plays a key role in generating and transmitting nerve impulses that initiate muscle contraction and in maintaining electrolyte balance. Therefore, all three minerals are vital for proper muscle function

Answer: (d) 1, 2 and 3; Difficulty Level: Easy