Answer:
Your A
answer is: C. <em>To </em><em>maintain</em><em> </em><em>normal </em><em>heart </em><em>rhythm</em>
Explanation:
A pacemaker signals the heart to beat when the heartbeat is too slow or irregular. A pulse generator is a small metal case that contains electronic circuitry with a small computer and a battery that regulate the impulses sent to the heart.
Individuals need to adjust their physical activity to account for reduced flexibility, a loss of balance, as well as decreased energy levels as they age. As we see, there is a number of rather unwanted changes which happen with old age so the correct answer would be D - all of the above.
The answer is C :) I hope this helps!
Answer:
endothelium is the correct answer
