...-dependently elevated P DA (50 pmol: +36%) without changing f H . At the highest dose tested, this hypertensive phase was preceded by a rapid and transient hypotensive response. In conclusion, our study suggests that endogenous CGRP within the brain of the trout may act as a potent neurotransmitter...

... by more than 100 % and reduced blood volumes 8·6 and 17·0% in Elaphe and Crotalus , respectively. These data demonstrate that blood volume varies substantially in relation to activity or the hypertensive state of these reptiles. Thus care must be employed in interpreting or comparing reported measurements...