Hemicholnium3 blocks the choline transporter preventing recy

Hemicholnium-3 blocks the choline transporter, preventing recycling of choline. This drug is a/an:

1. antagonist

2. promotor

3. agonist

4. villain

Solution

1. antagonist

Hemicholnium-3 blocks choline transporter, thereby blocking the reuptake of choline. Therefore Hemicholnium-3 is called and antagonist ( a substance which has inhibitory effect on the fucntion)