The acetylcholine receptor at the neuromuscular junction, which activates muscle contraction, is a a. ligand-gated K+ channel b. G-protein-coupled receptor c. ligand-gated Na+ channel
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When acetylcholine binds to its receptor, it causes the opening of an ion channel, allowing ions to flow across the membrane. This leads to depolarization and ultimately muscle contraction. Now, let's consider the options: a. ligand-gated K+ channel: Potassium Show more…
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Adi S.
In addition to neurons, muscle cells undergo depolarization, although smaller and slower than in the neuron, as a result of the activity of the acetylcholine receptor (a) The acetylcholine receptor is also a gated ion channel. What triggers the gate to open? (b) The acetylcholine receptor/ion channel is specific for $\mathrm{Na}^{+}$ ions. Would $\mathrm{Na}^{+}$ ions flow in or out? Why? (c) How would the $\mathrm{Na}^{+}$ flow through the ion channel change the membrane potential?
Which of the following chemicals triggers (activates/opens) a ligand-gated sodium channel on a skeletal muscle cell membrane? a) acetylcholine b) serotonin c) NADH d) Ca2+
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