The density of adrenergic innervation of the cat's nictitating membrane as a factor influencing the sensitivity of the isolated preparation to l-norepinephrine.

Acetylcholine/pharmacology Animals Cats Chromatography Collagen/analysis Densitometry Elastin/analysis Epinephrine/pharmacology Female In Vitro Techniques Isoproterenol/pharmacology Male Muscle Contraction/drug effects Muscle Proteins/analysis Muscle, Smooth/analysis,drug effects,innervation Nictitating Membrane/analysis,drug effects Norepinephrine/analysis,pharmacology Phenylephrine/pharmacology Synephrine/pharmacology Tritium Tyramine/pharmacology

Muscle Proteins Tritium Phenylephrine Collagen Elastin Isoproterenol Acetylcholine Synephrine Norepinephrine Tyramine Epinephrine