Pupil constriction (miosis)

1. Cholinergic vs. Noradrenergic Neurons (Neuroscience Tips)
2. Noradrenaline vs. Adrenaline (Neuroscience Tips)
3. Rhodopsin vs. Opsin (Neuroscience Tips)
4. Serotonin vs. Noradrenaline (Neuroscience Tips)
5. Sympathetic Nervous System vs. Parasympathetic Nervous System (Neuroscience Tips)