Intercalated discs
A) are characteristic of smooth muscle cells.
B) contain gap junctions that allow the signal to spread quickly through cardiac muscle cells.
C) support fast-twitch fibers of skeletal muscle.
D) stimulate pacemaker cells in cardiac muscle.
E) stimulate the contraction of skeletal muscle.

Question

Quizplus · Accepted Answer

Intercalated discs are specialized connections between cardiac muscle cells that contain gap junctions, allowing electrical signals to spread rapidly, facilitating synchronized contraction of the heart.

Intercalated Discs