1. 1. Primary interaction with oxytocin accounted for a significant prolongation of the time interval between two systolic contractions of the contractile vacuole in Tetrahymena, whereas primary interaction with vasopressin had no appreciable influence on that functional parameter. 2. 2. Primary treatment (imprinting) with vasopressin increased sensitivity to vasopressin and reduced responsiveness to oxytocin. 3. 3. Primary treatment (imprinting) with oxytocin did not increase cellular response either to oxytocin or to vasopressin on second exposure. 4. 4. Oxytocin, which is chemically related to the antidiuretic hormone vasopressin, influences the water metabolism in protozoa; vasopressin develops a similar effect after imprinting. 5. 5. The experimental observations allow conclusions on certain events involved in the phylogenesis of hormones and receptors.
|Number of pages||3|
|Journal||Comparative Biochemistry and Physiology -- Part A: Physiology|
|Publication status||Published - Jun 1992|
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