What component of the cardiac muscles cells enables action potentials to pass easily from one cell to the next?
select one:
a gap junctions
b. t tubules
c. smooth sarcoplasmic reticulum
d fibrous rings

A. Gap Junctions

Explanation - Cardiac muscle cell are able to contract in synchronized manner because of the gap junctions of intercalated discs. The action potential is expanded by the gap junction to support the coordinated contraction of the cardiac muscle.

Excitation contraction coupling or ECC is the process by which contraction of muscle occurs. It converts the electrical stimulus sent by the neurons to mechanical response to promote the movement of the muscle. Gap junctions thus helps in connecting the cardiac muscle cell.  

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

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jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.