Question

A heartbeart is due to _____.

A. nervous tissue responses B. No answers are correct.
C. flowing connective tissue D. muscle contractions

Answer 1

I'm honestly not sure which one I'd pick but hopefully I can help you work through some of the answers.

The heart is a bit unusual because it can beat outside of the body for a short while without any input from the body it was removed from.

The nervous system plays a role in regulating your heartbeat, but the nervous system isn't responsible for sending a signal to the heart muscles every time it beats. Think of the nervous system as a metronome to a musician in this case, the metronome is telling the musician how fast to play, but the musician is playing all the notes herself.

Flowing connective tissues doesn't seem like the correct answer. Connective tissue can't move on its own without the aid of smooth, striated, or cardiac muscle tissue and muscle tissue isn't having any effect on whether or not a muscle contracts. The muscle is what's doing all the work, not the connective tissue.

I'm tempted to say muscle contractions, because your heartbeat is essentially the contraction of the cardiac muscle tissue that makes up most of the heart.

Answer 2

muscle contractions