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Questions and Answers
Which step in the excitation-contraction-relaxation cycle involves the opening of voltage-gated Ca2+ channels?
Which step in the excitation-contraction-relaxation cycle involves the opening of voltage-gated Ca2+ channels?
- Binding of acetylcholine to nicotinic receptors
- Depolarization of the plasma membrane (correct)
- Continuous influx of Na2+
- Action potential traveling along the axon
What is the role of acetylcholine in the excitation-contraction-relaxation cycle?
What is the role of acetylcholine in the excitation-contraction-relaxation cycle?
- Creating the action potential
- Binding to nicotinic receptors (correct)
- Generating the end plate potential
- Causing the opening of voltage-gated Ca2+ channels
What is the effect of the continuous influx of Na2+ in the excitation-contraction-relaxation cycle?
What is the effect of the continuous influx of Na2+ in the excitation-contraction-relaxation cycle?
- Depolarization of the plasma membrane
- Creation of the end plate potential (correct)
- Opening of voltage-gated Ca2+ channels
- Binding of acetylcholine to nicotinic receptors
What is the purpose of the excitation step in the excitation-contraction-relaxation cycle?
What is the purpose of the excitation step in the excitation-contraction-relaxation cycle?
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What triggers the creation of an action potential in the excitation-contraction-relaxation cycle?
What triggers the creation of an action potential in the excitation-contraction-relaxation cycle?
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