The process of spermatogenesis produces: a. sperm cells in cycles of 28 days

b. sperm cells from puberty to age 50

c. only one functional sperm cell and three polar bodies

d. sperm cells from puberty throughout life

Which of the following requires the action of a first class lever in the body

Match each disease with the body system it affects

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