Multiple Choice
In skeletal muscle, what event directly initiates an action potential in the muscle fiber (sarcolemma)?
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15. Cytoskeleton and Cell Movement
Muscle Contractions
Multiple Choice
In skeletal muscle, the specialized synapse where a motor neuron meets a muscle cell is called the:
A
Tight junction
B
Intercalated disc
C
Gap junction
D
Neuromuscular junction
Verified step by step guidance1
Understand that the problem is asking for the name of the specialized synapse between a motor neuron and a skeletal muscle cell.
Recall that a synapse is a junction where a neuron communicates with another cell, such as a muscle cell, to transmit signals.
Identify that in skeletal muscle, the specific synapse where the motor neuron releases neurotransmitters to stimulate muscle contraction is called the neuromuscular junction.
Recognize that other options like tight junctions, intercalated discs, and gap junctions refer to different types of cell connections not involved in neuron-to-muscle communication.
Conclude that the correct term for this specialized synapse is the neuromuscular junction.
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