What is the function of the chordae tendineae?
a. to anchor the bicuspid valve flaps and prevent backflow of blood into ventricles
b. to anchor the aortic valve flaps and prevent back flow into the ventricles
c. to anchor the semilunar valve flaps and prevent backward flow of blood into the ventricles
d. to anchor the AV valve flaps and prevent back flow of blood into the atria
Answer: d. to anchor the AV valve flaps and prevent back flow of blood into the atria
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The kidneys help to regulate the pH of body fluids by controlling the
A. Secretion of hydrogen ions B. Conversion of acids to bases C. Filtration of buffers D. Reabsorption of CO2
Blood is pumped into the pulmonary circuit from the
A) left atrium. B) left ventricle. C) right atrium. D) right ventricle.
Adequate calcium absorption from the GI tract depends on
A. serum K levels. B. serum calcitonin levels. C. adequate amounts of vitamin D. D. the osmolality of the extracellular fluid. E. adequate amounts of vitamin C.
When two hydrogen atoms and one oxygen atom are removed from adjacent monomers, the overall chemical reaction results in
A. dehydration synthesis. B. forming an acid. C. hydrolysis. D. methyl exchange.