Long-term activation of your body’s stress response system, along with prolonged exposure to cortisol and other stress hormones, puts you at risk for health troubles. These health issues include digestive problems, anxiety, headaches, depression, sleep problems, weight gain, memory and concentration issues, high blood pressure, heart disease and strokes. Being stressed also lowers your threshold for pain, causing more extreme discomfort from the previous affects.
Answer: the antigens identify the foreign invader
Regular exercise helps make us more alert and energetic, by releasing endorphins which is a chemical that improves our mood.
#1 would be A, #2 would be false, as narcotics are incredibly addictive. #3 is absolutely true, as abuse of almost any medical thing can be life threatening.
Go to bib me or sum and copy and paste the url into the little box and it will give you the bib