Myocardial cells have long refractory periods in order to ensure each contraction is. This is due to the presence of
channels in these cells that allow theof ions right after
ions have entered.

These contractile elements are virtually identical to skeletal muscle. ... (a) Cardiac muscle cells have myofibrils composed of myofilaments arranged in sarcomeres, ... The refractory period is very long to prevent the possibility of tetany, a ... At this point, the calcium ion channels close and K+ channels open, allowing outflux ..

Explanation:

answer; ///i do believe that the correct answer is (c) hold atoms together to form compound;

answer; i believe that the correct answer to this statement is (exoticism); //

exoticism was a trend where musicians created music based on a far off foreign