In cardiac muscle
A) calcium enters the cell from storage chambers called intercalated discs.
B) an action potential spreads throughout the Z discs.
C) intercalated discs connect the muscle fibers together.
D) potassium is released from the sarcoplasmic reticulum.

Question

Quizplus · Accepted Answer

Intercalated discs are specialized structures in cardiac muscle that connect muscle fibers together, facilitating the rapid and coordinated spread of action potentials across the heart muscle, which is essential for synchronized contraction.

In Cardiac Muscle