Which of the following statements about cardiac muscle is incorrect?
A) Cardiac muscle forms an electrically coupled mass called a syncytium.
B) Much of the calcium necessary for contraction comes from outside the cell.
C) In cardiac muscles, the T-tubules form diads rather than the triads formed in skeletal muscles.
D) All of the above statements are correct.

Question

Quizplus · Accepted Answer

All the statements provided about cardiac muscle are correct. Cardiac muscle indeed forms a syncytium allowing for coordinated contractions, relies significantly on extracellular calcium for contractions, and has diads instead of triads in its structure, distinguishing it from skeletal muscle.

Which of the Following Statements About Cardiac Muscle Is Incorrect