Final answer:
The diversion of blood away from an organ due to vasoconstriction is termed shunting, which can lead to ischemia and hypoxia.
Step-by-step explanation:
The diversion of blood away from an organ by vasoconstriction is termed shunting. Vasoconstriction is the narrowing of a blood vessel, which reduces blood flow to the tissue region downstream of the vessel. This action can lead to ischemia, which is reduced blood flow that may result in hypoxia, a decreased supply of oxygen to the tissues and potentially cell death. It’s important to differentiate between shunting, ischemia, and perfusion. Ischemia refers to an inadequate blood supply to an organ or part of the body, particularly the heart muscles. Perfusion is the passage of fluid through the circulatory system or lymphatic system to an organ or a tissue. Shunting, in this case, specifically describes the physiological process where blood is diverted from one body part to another due to the process of vasoconstriction.