By what means does an electrical impulse travel deep into a skeletal muscle fiber in order to trigger a contraction?
A) Via the sarcoplasmic reticulum
B) Via transverse tubules
C) Via mitochondria
D) Via motor end plates
E) Via gap junctions

Question

Quizplus · Accepted Answer

Transverse tubules (T-tubules) are invaginations of the plasma membrane found in skeletal and cardiac muscle cells. They allow electrical impulses to travel deep into the muscle fiber, ensuring that the signal for contraction reaches all parts of the muscle cell efficiently. This is crucial for the coordinated contraction of muscle fibers.

By What Means Does an Electrical Impulse Travel Deep into a Skeletal