If the binding of muscarine to its receptor in the heart causes the beta-gamma complex of the G-protein to bind to a K+ channel,
A)the K+ channel will close,leading to depolarization.
B)the K+ channel will open,leading to depolarization.
C)the K+ channel will close,leading to hyperpolarization and inhibition.
D)the K+ channel will open,leading to hyperpolarization and inhibition.

Question

Quizplus · Accepted Answer

When the K+ channel opens, more K+ ions leave the cell, making the inside of the cell more negative compared to the outside. This leads to hyperpolarization, which inhibits the cell's activity by making it less likely to fire an action potential.

If the Binding of Muscarine to Its Receptor in the Heart