Definition of sociopolitical. : of, relating to, or involving a combination of social and political factors.
Beta-1 receptors are found in the heart, and when stimulated will increase herat rate and cardiac contractility. Beta-2 receptors are found on vascular smooth muscle located in the heart and skeletal muscle, and when they are activated, they dilate and decrease SVR.
Because of the special action of 5-HT2 receptors, antagonism of serotonin at those receptors would result in a decrease in neural activity which would not explain the effects of LSD. If 5-HT2 receptors are in fact excitatory, one would expect antagonism of this system to have an inhibitory effect.