[Solved] The thiazide diuretic hydrochlorothiazide is an example of a drug that acts on which type of receptor? A)Ion channel B)Nuclear receptors C)G-protein receptor complex D)Second messenger systems Sinoatrial Node: A group of cells in the right atrium of the heart that initiates the electrical impulses determining the heart rate, often called the heart's natural pacemaker. Atherosclerotic Changes: Alterations in blood vessels characterized by the accumulation of fatty deposits along their inner walls. Internal Bleeding: Bleeding within the body that can result from injury or illness, potentially leading to serious health complications without immediate treatment. Perfusion: The passage of fluid through the circulatory system or lymphatic system to an organ or a tissue.