Final answer:
Vasodilation is promoted by exercise and heat, while Angiotensin II and Epinephrine are vasoconstrictors.
Explanation:
Vasodilation is the widening of blood vessels, leading to increased blood flow and decreased blood pressure. Among the options provided, exercise and heat promote vasodilation by increasing blood flow to meet the body's demand for oxygen and nutrients during physical activity or exposure to high temperatures, respectively. On the other hand, Angiotensin II and Epinephrine are vasoconstrictors, causing blood vessels to narrow and increasing blood pressure.
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