Between the ages of 20 and 80, humans lose about ________ of their renal function.
A. 25%
B. 50%
C. 40%
D. 30%
Answer: B
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The true ribs are
A) ribs 1-7. B) called vertebrosternal ribs. C) ribs 8-12. D) called vertebrochondral ribs. E) ribs 1-7 and are called vertebrosternal ribs.
Three factors that increase the rates of enzyme-controlled reactions are the
A) number of enzyme and substrate molecules formed and strength of the enzyme. B) number of enzyme molecules, number of substrate molecules, and efficiency of the enzyme. C) temperature of the reaction, number of H2O molecules, and bond strength. D) size of the enzyme compared to the substrate, the number of active sites, and the ratio of enzyme to substrate molecules.
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The cerebrum develops from the ________ whereas the cerebellum develops from the ________
A) midbrain, hindbrain B) forebrain, hindbrain C) forebrain, midbrain