What percentage of sodium in the blood is filetered and returned to the body by the kidney?
A) 90%
B) 99%
C) 80%
D) 50%
Answer: B) 99%
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Cytokines
A. inhibit production of T and B cells. B. are soluble proteins that act as signaling molecules to stimulate white blood cells. C. are secreted by macrophages to stimulate the replication of cancer cells. D. repel neutrophils from the site of infection.
Simple goiter can be prevented by
A. administration of insulin. B. administration of ACTH. C. surgery to remove the thyroid gland. D. increasing intake of iodine in the diet. E. removal of the pituitary.
All microorganisms are parasites.
Answer the following statement true (T) or false (F)
All of the following pertain to nitrogenous bases except
A. they form pairs by hydrogen bonding. B. cytosine and thymine are pyrimidines. C. adenine pairs with thymine. D. guanine pairs with uracil. E. they allow variation from one nucleotide to another which creates the encoded information.