Avoid stretches which:
a) hyperextend the neck
b) over bend a joint
c) compress the vertebrae
d) all of the above
i think it's d not sure

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)

Signs of a sprain might include: a deformed appearance immobility a grinding sensation swelling

Some bacteria injure cells by giving off poisons called pathogens antibodies phagocytes toxins