Tunnel-Like Extensions of the Sarcolemma into a Skeletal Muscle Fiber

Question

Tunnel-like extensions of the sarcolemma into a skeletal muscle fiber are called
A)sarcomeres
B)myofibrils
C)transverse tubules
D)tropomyosin
E)myosin cross bridges

Accepted Answer

Tunnel-like extensions of the sarcolemma into a skeletal muscle fiber are called transverse tubules. Sarcomeres and myofibrils are structures within the muscle fiber itself. Tropomyosin and myosin cross bridges are proteins involved in muscle contraction.