Refer to the figure below. Based on the figure, which statement about the acetylcholine receptor is true? A) Sodium ions can diffuse into the cell directly through the cell membrane. B) Acetylcholine binds and causes the Na⁺ ion channel to change shape and open. C) The receptor is a gated acetylcholine channel. D) The acetylcholine receptor is an intracellular receptor. E) Acetylcholine enters the cell through the channel in the receptor.

Question

Quizplus · Accepted Answer

The figure depicts the structure of an acetylcholine receptor and shows that binding of acetylcholine causes a conformational change in the Na+ ion channel domain of the receptor, leading to the opening of the channel and the flow of Na+ ions into the cell. Therefore, option B, "Acetylcholine binds and causes the Na⁺ ion channel to change shape and open," is the correct statement about the acetylcholine receptor.

Refer to the Figure Below