Refer to the Figure Shown

question 53

Multiple Choice

Refer to the figure shown.
Which statement best describes what is occurring in the bottom panel?

• A) More electrical stimulation is occurring on the voltage-gated channels; therefore, they open with more frequency.
• B) The increased concentration of acetylcholine eventually overwhelms the receptors, and the bottom panel represents what will happen just before they remain open permanently.
• C) Because the channels are staying open longer due to increased acetylcholine concentration, K⁺ begins to move in significant quantities.
• D) In this section of membrane, there are two acetylcholine channels that, in the presence of increasing neurotransmitter concentration, have an increasing probability of being open at the same time.