Using a Specific Chemical,a Cell Biologist Has Blocked One Type

Multiple Choice

Using a specific chemical,a cell biologist has blocked one type of channel-linked receptor in a lab rat's liver tissue.What was the likely mechanism of the chemical she used?

A) The chemical prohibits binding of a ligand to the receptor.
B) The chemical prohibits ions from entering the cell via active transport.
C) The chemical causes ions to move in the opposite direction of the ion gradient.
D) The chemical prohibits second messenger signaling.