Which of these is not part of the body's immune system?
a. antibodies
b. memory cells
c. red blood cells
d. white blood cells

Which of the following is a positive response to stress? select one: a. smiling b. naming it c. working more d. joking about how stressed you are

Microbes in the gut ferment fiber and complex carbohydrates and form vitamins, short chain fatty acids and

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