Multiple Choice
During the phase of excitation-contraction coupling of skeletal muscle, what occurs immediately after the action potential spreads down the T tubule?
9. Muscle Tissue
Steps of Muscle Contraction
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Muscle cells initiate nerve impulses.
A
False
B
True
Verified step by step guidance1
Understand the roles of muscle cells and nerve cells: Muscle cells are responsible for contraction and movement, while nerve cells (neurons) are responsible for transmitting nerve impulses.
Identify the origin of nerve impulses: Nerve impulses are initiated by neurons, not muscle cells. Neurons generate electrical signals that travel along their axons to communicate with other neurons or muscle cells.
Clarify the interaction between neurons and muscle cells: Neurons can stimulate muscle cells to contract by releasing neurotransmitters at the neuromuscular junction, but muscle cells do not initiate nerve impulses.
Consider the physiological process: When a nerve impulse reaches the end of a motor neuron, it triggers the release of neurotransmitters that bind to receptors on the muscle cell membrane, leading to muscle contraction.
Conclude the explanation: Since muscle cells do not initiate nerve impulses, the statement 'Muscle cells initiate nerve impulses' is false.
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