I think scientists are so interested with our brains, because our brain could be considered the most powerful thing ever, everything man-made was from our brain. Our brain can literally scare itself to death. I think they are so interested because it is so powerful.
Answer:
Should speak up.
Explanation:
It is health related matter you should speak up for the betterment of patient.
You should tell him/her about drug-drug interaction that is going to occur and possible effect it is causing to her/his health.
Answer:
the nicotine damages their lungs
Explanation:
a non smoker wouldn't have nicotine or anything else caused by smoking affecting their lungs. non smokers would have way healthier and less infection prone lungs than smokers