Melanocytes and keratinocytes work together in protecting the skin from UV damage when keratinocytes ________
A) maintain the appropriate pH in order for the melanocyte to synthesize melanin granules
B) maintain the appropriate temperature so the product of the melanocyte will not denature
C) accumulate the melanin granules on their superficial portion, forming a UV-blocking pigment layer
D) provide the melanocyte with nutrients necessary for melanin synthesis
C
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A difference in partial pressure between the venous blood and the surrounding structures is known as a partial pressure gradient
a. True b. False Indicate whether the statement is true or false
A cell finishing mitosis has ________ DNA molecules, while a cell finishing DNA replication has ________ DNA molecules
A) 23; 23 B) 46; 23 C) 46; 46 D) 23; 46 E) 46; 92
Which statement regarding control of pancreatic secretion is correct?
a. gastrin stimulates release of neutralization solution. b. CCK stimulates release of enzymes. c. secretin stimulates release of bicarbonate. d. both (a) and (b) above. e. both (b) and (c) above.
Most of the progeny of an activated B-cell clone differentiate into ____________________ cells, which produce antibodies, and ____________________ cells, which remain dormant and expand the specific clone
Fill in the blank(s) with correct word