Which is a disease of the sespiratory system often caused by smoking

a) emphysema

b) atherosclerosis

c) idiopathic edema

d) thalassemia

If you see someone who is injured at a workplace, the first thing you should do is a. call 9-1-1 or your local emergency number b. begin to administer first aid c. check the scene for danger d. try to discover what is wrong with the person select the best answer from the choices provided a b c d

Which of the following is a health risk associated with ground-level ozone? a.cataractsb.skin cancerc.respiratory illnessd.all of the above

Which is the term used for a drug that increases the activity of the nervous system