What structural component in skeletal and cardiac muscle conducts action potentials from the outer surface of the muscle fiber inside to the myofibrils?
A)actin
B)tropomyosin
C)troponin
D)transverse tubule
E)None of thesE.

Question

Quizplus · Accepted Answer

The transverse tubule (T-tubule) is a structural component present in both skeletal and cardiac muscle fibers that conducts action potentials from the outer surface of the fiber inside to the myofibrils. This process allows for coordinated contraction of muscle fibers. Actin, tropomyosin, and troponin are all structural components directly involved in the contractile process of muscle fibers, but they do not conduct action potentials.

What Structural Component in Skeletal and Cardiac Muscle Conducts Action