Humoral immunity is a type of adaptive immunity that results in the circulation of which of the following throughout the blood? A. antigens

B. macrophages

C. natural killers

D. antibodies

Which of these internal feedback reactions does not need your brain? oa. your leg jumping when it is hit by a reflex hammer b. your deeper breathing when you need more oxygen c. your body temperature rising when you have an infection d. your heart beating faster when you are in danger