1) It affects the brain
2) Mental alertness
3) irritability
I would say D for this one mostly because I know for sure most of these answers are right.
:) hope i helped
1. carbon monoxide.
2. Which important organ is part of the cardiovascular system? Heart.
3. water.
4. medicine abuse
5. cool-down
6. The body is more vulnerable to disease.
7. the first time you use them
8. physical activity
9. seizures
10. nervous system
1. family doctor
2. sharing toothbrushes
3. all of these
4. True
5. False
6. 20
7. False
8. tracking the spread of diseases
9. False
10. False
11. rapid test
12. vaccine
13. eating contaminated food
14. white blood cells
15. There is no cute for HIV/AIDS
