When the semilunar valves close, the AV valves then
A) close.
B) open.
C) make the third heart sound.
D) All of the answers are correct.
E) None of the answers is correct.
Answer: B
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The pituitary hormone that promotes egg development in ovaries and sperm development in testes is
A) TSH. B) ACTH. C) FSH. D) LH. E) GH.
First-class levers ________
A) are typified by tweezers or forceps B) are used when standing on tip-toe C) in the body can operate at a mechanical advantage or mechanical disadvantage, depending on specific location D) have load at one end of the lever, fulcrum at the other, and effort applied somewhere in the middle
The order in which HIV breaches barriers and affects immunity is
A. ingestion, entering the circulation, entering helper T cells. B. crossing the mucosal barrier, entering macrophages, then B cells, then natural killer cells. C. crossing the mucosal barrier, entering macrophages, entering helper T cells, then cytotoxic T cells. D. inhalation, entering the circulation, entering helper T cells.
Glycogen is the
A. storage carbohydrate in animals. B. storage carbohydrate in plants. C. sugar found in RNA. D. major nutrient for most body cells. E. nondigestible plant polysaccharide.