Final answer:
When the internal temperature increases, blood flow to the skin will increase through vasodilation, allowing for heat release from the body. Other responses include increased sweating and shallow breathing.
Step-by-step explanation:
When the internal temperature increases, blood flow to the skin will increase. This is because the blood vessels in the skin dilate to allow more blood to flow, which helps to release heat from the body. This is known as vasodilation. In addition to vasodilation, other responses to increased internal temperature include increased sweating and shallow breathing.