Multiple Choice
In skeletal muscle fibers, what is the name of the muscle cell membrane?
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15. Cytoskeleton and Cell Movement
Muscle Contractions
Multiple Choice
In skeletal muscle physiology, a motor neuron meets a muscle cell at the:
A
T-tubule
B
Intercalated disc
C
Z disc
D
Neuromuscular junction (motor end plate)
Verified step by step guidance1
Understand the role of a motor neuron in skeletal muscle physiology: it transmits nerve impulses to muscle cells to initiate contraction.
Identify the structure where the motor neuron interfaces with the muscle cell to transmit these signals; this specialized synapse is called the neuromuscular junction or motor end plate.
Recognize that the T-tubule is an invagination of the muscle cell membrane involved in conducting action potentials into the muscle fiber, but it is not the site where the neuron meets the muscle cell.
Know that the intercalated disc is a structure found in cardiac muscle cells, facilitating electrical and mechanical connection between cells, not involved in skeletal muscle innervation.
Recall that the Z disc is part of the sarcomere structure within muscle fibers, serving as an anchor for actin filaments, and is unrelated to the neuron-muscle connection.
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