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

Aduty of the adult assigned to supervise a group of children is to a. check on the children at least every 20 minutes. b. keep the children within earshot. c. give the children a list of "don'ts" concerning behavior. d. conduct a name-to-face check when transitioning to the playground

Group of genes that encode molecules found in all body cells, creating a biochemical “fingerprint” that serves as the “id” for cells so that they are marked as “self” a) deoxyribonucleic acid (dna) b) entry inhibitors c) major histocompatibility complex (mhc) d) non-nucleoside reverse transcription inhibitors (nnrtis)

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