An increase in extracellular Ca²⁺ generally increases A) the heart rate. B) the force of contraction. C) autonomic stimulation of the heart. D) Na⁺ channel opening. E) the frequency of the action potentials.

Question

Quizplus · Accepted Answer

An increase in extracellular calcium generally increases the force of contraction of the heart, as calcium ions play a crucial role in the excitation-contraction coupling process, enhancing the strength of myocardial muscle contractions.

An Increase in Extracellular Ca2+ Generally Increases

An Increase in Extracellular Ca²⁺ Generally Increases