Question

from the following options, select three functions of calcium. check all that apply muscle contraction nerve impulse transmission antioxidant defense blood clotting

Explanation:

Calcium is crucial for muscle contraction as it binds to troponin, allowing actin - myosin interaction. In nerve impulse transmission, calcium influx at the synaptic terminal triggers neurotransmitter release. For blood clotting, calcium ions are involved in the coagulation cascade, activating clotting factors. Antioxidant defense is mainly the role of substances like vitamins C and E, not calcium.

Answer:

Muscle contraction, Nerve impulse transmission, Blood clotting