The angiotensin receptors are part of the G protein-coupled receptor family, mainly including the types AT1 and AT2. They are primarily composed of seven transmembrane helices and are widely distributed in tissues such as the cardiovascular system and kidneys. These receptors, through the activation of various signaling pathways like cAMP and the inositol phosphate pathway, play a role in regulating blood pressure, electrolyte balance, and cell proliferation. Activation of AT1 receptors promotes vasoconstriction and salt-water reabsorption, while the actions of AT2 receptors are generally opposite to those of AT1. Gene expression exhibits tissue specificity, and mutations or alterations in function are closely associated with conditions such as hypertension and cardiovascular diseases.