In Which Ion Would a Defect in Transport Have the Most

Question

In which ion would a defect in transport have the most direct effect on muscle contraction? A) Na⁺ B) Ca²⁺ C) Zn²⁺ D) K⁺

Accepted Answer

Calcium ions (Ca2+) play a crucial role in muscle contraction by binding to troponin, which triggers the sliding of actin and myosin filaments over each other, leading to muscle contraction. A defect in calcium transport would directly affect this process.