Double-negative thymocytes initiate rearrangement at the _____ locus (loci) before all other T-cell receptor genes
a. ? and ?
b. ?
c. ? and ?
d. ?, ?, and ?
e. ?, ?, and ?.
E
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Cholesterol absorption inhibitors work by _________.
a. inhibiting the enzyme needed for cholesterol syntheses b. binding with bile acids in the intestine, which reduces the total body cholesterol c. inhibiting the mobilization of free fatty acids from the peripheral tissues d. inhibiting intestinal absorption of both dietary and biliary cholesterol, blocking its transport in the small intestine
The hormone testosterone is produced by the ________
A) ovaries B) testes C) pituitary gland D) thymus
The urinary system works most directly on ________ .
a. extracellular fluid b. plasma c. electrolytes within the blood d. ions in the blood e. intracellular fluid
A substance, situation, or disease with the ability to cause birth defects is known as
A) allergenic. B) genetic. C) teratogenic. D) toxic.