When the ventricular walls contract,
A. the tricuspid valve opens and the mitral valve closes.
B. the mitral and tricuspid valves open.
C. the mitral valve opens and the tricuspid valve closes.
D. the mitral and tricuspid valves close.
Answer: D
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A. liver B. kidney C. small intestine D. pancreas E. stomach
The growth spurt seen in puberty is triggered by ________.
A. parathyroid hormone B. thyroid hormone C. growth hormone D. calcitonin E. sex hormones
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A. Secretes a chemical to repel platelets so blood can easily flow through the vessel B. Anchors the vessel to surrounding tissue C. Contracts to move the blood through the vessel D. None of these are correct.
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Answer the following statement true (T) or false (F)