Countries with opt-out consent policies for organ donation tend to have higher rates of donation than those with opt-in consent policies. what is opt-in consent? a. the decision to donate organs is left to attending physicians. b. donation occurs automatically unless otherwise requested. c. people must actively register to be organ donors. d. hospital policy determines whose organs are donated.

Melanocytes and keratinocytes work together in protecting the skin from uv damage when keratinocytes a. provide the melanocyte with a protective shield against abrasion b. maintain the appropriate temperature so the product of the melanocyte will not denature c. maintain the appropriate ph in order for the melanocyte to synthesize melanin granules d. accumulate the melanin granules on their superficial portion, forming a uv-blocking pigment layer