What is one way that the nervous system and the circulatory system interact? a the brain detects temperature changes and instructs the nerves to send messages to the blood to heat up or cool down. b the nerves in the skin detect temperature changes and send a signal to the brain to instruct the blood vessels to adjust to regulate blood temperature. c the blood gets too hot or too cold and causes the blood vessels to dilate or constrict which causes the nerves to tingle and the brain detects this. d the blood vessels dilate or constrict which causes the blood to heat up or cool down which makes the nerves tell the brain to act.