What three general defense mechanisms can the body use as a second line of defense to prevent the pathogen from causing a major infection?

Explain what causes the skin to burn in the sun? explain why people should avoid the sun if taking a photosensitive medication?

Wjat are substances intentionally added to food to produce a desired effect?

Checking blood sugar levels before, during, and after exercise is important for diabetics. select the best answer from the choices provided. t f