Final answer:
Adrenaline causes blood vessels in the skin to constrict, decreasing blood flow to this area while prioritizing essential organs and muscles.
Step-by-step explanation:
Increasing adrenaline content in the blood would be expected to decrease the flow of blood to the skin. This occurs because adrenaline causes the blood vessels in the skin to constrict. It is part of the body's "fight-or-flight" response and is designed to prioritize blood flow to essential organs and muscles during times of stress. While blood flow to the brain, heart, and muscles increases, areas like the skin receive less blood flow due to vasoconstriction.