<P> Specific actions of the β receptor include: </P> <Ul> <Li> Increase cardiac output by increasing heart rate (positive chronotropic effect), conduction velocity (positive dromotropic effect), and stroke volume (by enhancing contractility--positive inotropic effect). </Li> <Li> Increase renin secretion from juxtaglomerular cells of the kidney . </Li> <Li> Increase ghrelin secretion from the stomach . </Li> </Ul> <Li> Increase cardiac output by increasing heart rate (positive chronotropic effect), conduction velocity (positive dromotropic effect), and stroke volume (by enhancing contractility--positive inotropic effect). </Li> <Li> Increase renin secretion from juxtaglomerular cells of the kidney . </Li>

Difference between alpha 1 and alpha 2 receptors