What are macrophages?
pathogens found in mucus
red blood cells
germs produced by the spleen
white blood cells that engulf pathogens

In which way does nicotine cause addiction? by stimulating the brain's pleasure center by increasing blood-sugar levels by decreasing dopamine levels by reducing depression and anxiety

Describe the potential effects, on people, of unprotected exposure to the sun.give an example of 1 new thing have you learned about the sun’s uv rays.

Analyze the relationship between good nutrition and disease prevention: how can reducing your saturated fat intake lower the risk of heart disease?