What is the function of a pacemaker? a. To stimulate the heart to contract b. To increase the force of cardiac contractions c. To increase the heart’s stroke volume d. To improve the heart’s contractility

a. To stimulate the heart to contract

Explanation:

A peacemaker uses small electrical impulses to stimulate the heart muscle chambers to contract. This contraction forces blood to flow. The device mimicks the hearts natural electrical conducting system and this electrical impulses are delivered through electrodes.

A. To stimulate the heart to contract.

Explanation:

A pacemaker is a small artificial device that is placed in the chest or abdomen to help control abnormal heart rhythms or heartbeat. This device uses electrical pulses to prompt the heart to beat at a normal rate.

This electrical impulse is propagated throughout the right atrium, and through Bachmann's bundle to the left atrium, stimulating the myocardium of the atria to contract.

what is the question because that is not a question.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)