Question

If a ligand binds to a ligand-operated ion channel, what will happen? (choose the best option)

a.Ions are transformed into simple molecules to interpret the message.

b.The channel interacts with the G protein so that nearby substances move.

c.The receptor enzyme subunit is activated to initiate the message.

d.The channel is opened so that the ions can cross the membrane.

Answer 1

Ans) The correct answer is "d"

The binding of ligand to a ligand gated ion channel wil' result in the opening of the channel for allowing the flow of ions to cross the membrane. Example if ligand gated ion channel is Acetylcholine receptor which is present on postsynaptic cells.Upon depolarization, Na+ ions move in and this is how action potential is generated. Inhibitor of acetylcholine receptor is alpha- bungarotoxin and cobra toxin.