Effect of Some Adrenoceptor Activating and Blocking Drugs on Response of Fish Melanophores
نویسندگان
چکیده
The fresh water Indian neopterigian teleost, Cyprinuscarpio, a common carp deals with some aspect concerning chromatic regulatory mechanisms, within the boundary of the two points of view: one of these is the value of colour pattern, as signals to other animals for the purpose of recognition, stimulation or warning or for the purpose of concealment of predator of prey. In this field is included the phenomenon of rapid colour change. The other point ofview concerns the pharmacological nature of fiber which controls the activity of melanophores. In the present study on the fresh water fish Cyprinuscarpioemphased of those actions of some drugs which interfere with peripheral adrenergic transmission. Drug can inhibit, block and potentiateadrenergic mechanism in a variety of ways such as by affecting norepinephrine synthesis, norepinephrine storage, norepinephrine release norepinephrine uptake, norepinephrine inactivation, presynaptic action of norepinephrine and postsynaptic action of norepinephrine including alpha and beta adrenergic blockade.
منابع مشابه
Melatonin effects on the melanophores in adults and tadpoles of Rana cyanophlyctis (Schneider)
Introduction: Effects of melatonin (MT) were comparatively examined on melanophores of isolated skin in adults and tadpole’s tailfin of a frog Rana cyanophlyctis. MT is generally considered as a potent melanophores aggregating hormone besides regulating the sleep wake cycle in vertebrates. Methods: Melanophore size index (MSI) was chosen as a recording parameter of the responses. Concentr...
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