Question: TRUE

Answer: When the acetylcholine receptor sites are not occupied the sodium channels remain closed.

Question: TRUE

Answer: When the acetylcholine binds to the receptor sites the sodium channels open. Which causes sodium ions to diffuse through and enter the cell.

Question: TRUE

Answer: The sodium channels in the cell membrane have receptor sites for acetylcholine. This channel is formed by a channel protein.

Question: Acetylcholine

Answer: Neurotransmitter secreted at the ends of many neurons, responsible for the transmission of a nerve impulse across a synaptic cleft.