2. One way nicotine affects the nervous system is by
a. mimicking neurotransmitters.
b. decreasing its activity level.
c. deactivating the brain’s “reward pathway.”
d. reducing blood flow to the skin.
3. What part of the body is most affected by emphysema?
a. blood vessels
b. alveoli
c. bronchi
d. the heart

                                                        water

a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

                                                        halon  

any of a number of unreactive gaseous compounds of carbon with bromine and other halogens, used in fire extinguishers, but now known to damage the ozone layer.

                                                  dry chemical

extinguishing agent used on class a, class b, and class c fires.

                                                  carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. it is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.

a1 = unhealthy

a2= healthy

a3= healthy

the american revolution encouraged other countries

explanation:

explanation:

i dont know