The drug scopolamine is used to treat dizziness, motion sickness, and smooth muscle spasms. When isolated muscle cells are incubated with scopolamine, addition of acetylcholine no longer depolarizes the muscle cell membrane or stimulates muscle cell contraction. Which would best explain how scopolamine exerts its muscle-relaxing effects

scopolamine does inhibits the opening of acetylcholine-gated Na + channels in the muscle cell membrane. Acetylcholine in turn triggers muscle contraction by opening a ligand-gated Na + channel, which leads to membrane depolarization and contraction of the muscle cell.

Explanation:

Scopolamine can be defined as an intravenous and oral drug that is taken or used by individuals for the relief or prevention of motion sickness, reduction of nerve signals that do ignite or trigger vomiting. it is located and secreted of some organs in the body, e. g. the stomach and intestines.

it is used by some individuals to sheal or cure stomach or intestinal obsessions, muscle spasms e. t. c.