The following are true:
a. heroin causes miosis by increasing the release of acetylcholine.
b. botulinum toxin causes mydriasis by inhibiting the release of acetylcholine
c. phenylephrine causes mydriasis by stimulating the alpha receptors
d. amphetamine causes mydriasis by inhibiting noradrenaline reuptake
a. heroin causes miosis by increasing the release of acetylcholine.
b. botulinum toxin causes mydriasis by inhibiting the release of acetylcholine
c. phenylephrine causes mydriasis by stimulating the alpha receptors
d. amphetamine causes mydriasis by inhibiting noradrenaline reuptake