Children with vitamin A deficiency commonly experience chronic diarrhea and respiratory disease because vitamin A is important for production of immune cells, maintenance of the intestinal tract lining, and the _____
a. synthesis of antibodies
b. synthesis of osteoclasts
c. reformation of osteoblasts
d. formation of free radicles
a
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What organ is responsible for destruction of old RBCs and is a major site for the initiation of the immune response?
a. spleen b. liver c. bone marrow d. tonsils e. thymus
What is the main commodity in Alaska?
a. reindeer b. game c. seafood d. gold e. oil
According to the current body of scientific research, what is known about vitamin A toxicity?
a. No reports in industrialized countries b. Number of cases is extremely small c. Number of cases is moderate and increasing d. Number of cases is large but effects are minor
Substances cross cell membranes by passive and active transport
Indicate whether the statement is true or false