Animal 4 Aspirin 4 Indomethacin 4 Male 4 acetylsalicylic acid 4 autonomic nervous system 4 indometacin 4 prostaglandin 4 sympathetic nerve 4 Arthropod Venoms 2 Black Widow Spider 2 Catecholamines 2 Clonidine 2 Cyclooxygenase Inhibitors 2 In Vitro 2 Methoxamine 2 Mice 2 Muscle Contraction 2 Muscle, Smooth, Vascular 2 Neurons 2 Norepinephrine 2 Phenoxybenzamine 2 Potassium 2 Prostaglandins 2 Prostaglandins E 2 Prostaglandins F 2 Rats 2 Receptors, Adrenergic, alpha 2 Spider Venoms 2 Support, Non-U.S. Gov't 2