11.(3 marks) You are building a very simple new creature. It is going to use acetylcholine as a neurotransmitter. You have two neurons synapsing with two different effector cells. One of the effector cells you want to have a fast excitatory response and the other is to have a slow excitatory response. What kind of receptors should you use to ensure these differences in functionality?
. 12.(1 mark) What is the major difference between alpha 1 and alpha 2 receptors?
. 13.(1 mark) In the context of cell receptors what is an antagonist?