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.
Hormone-receptor binding triggers the target cell to do what its supposed to. The extent of target cell activation is affected by: levels of hormone in the blood, the amount of receptors for that hormone, and the affinity of the receptor for the hormone.