An increase in extracellular Ca 2+ generally increasesA) 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

An increase in extracellular Ca 2+  generally increasesA)  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.

Silvia Ellis · Accepted Answer

Final Answer : B, Explanation :  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

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.

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Learning Objectives

Related questions

An increase in extracellular Ca2+ generally increasesA) 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.

Definitions

Learning Objectives

Learning Objectives

Related questions

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.