Achronic disease that disrupts the brain's system for motivation and reward.

Describe the potential effects, on people, of unprotected exposure to the sun. give an example of 1 new thing have you learned about the sun’s uv rays.

What type of medicine to people take if they are lactose intolerance

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)