Cardiac muscle undergoes fast, synchronous contractions stimulated by ion flow. Which type of cellular junction is essential for achieving this action in cardiac muscle?
A) gap junctions
B) tight junctions
C) plasmodesmata
D) adhering junctions
E) desmosomes

Question

​Cardiac muscle undergoes fast, synchronous contractions stimulated by ion flow. Which type of cellular junction is essential for achieving this action in cardiac muscle?
A) ​gap junctions
B) ​tight junctions
C) ​plasmodesmata
D) ​adhering junctions
E) ​desmosomes

Quizplus · Accepted Answer

Gap junctions are essential for the fast, synchronous contractions in cardiac muscle because they allow for the direct passage of ions and small molecules between cells, facilitating the rapid spread of electrical signals necessary for coordinated muscle contraction.

​Cardiac Muscle Undergoes Fast, Synchronous Contractions Stimulated by Ion Flow

Cardiac Muscle Undergoes Fast, Synchronous Contractions Stimulated by Ion Flow