Animal 5 Rats Support, Non-U.S. Gov't 5 animal experiment 5 pineal body 5 rat 5 Rats, Inbred Strains 4 radioisotope 4 Pineal Gland 3 Receptors, Adrenergic, alpha 3 alpha adrenergic receptor 3 central nervous system 3 dose response 3 drug response 3 hypothalamus 3 5 methoxytryptophol 2 Dose-Response Relationship, Drug 2 Estradiol 2 Female 2 Ganglia, Sympathetic 2 Hypothalamus 2 Isoproterenol 2 Male 2 Norepinephrine 2 Phentolamine 2 Propranolol 2 Receptors, Adrenergic 2 Receptors, Adrenergic, beta 2 autonomic nervous system 2 beta adrenergic receptor 2