Which of the following does NOT increase surface area in the small intestine?
A) villi B) microvilli C) rugae D) circular folds
Answer: C
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What does oxygen deficit represent?
A) amount of energy needed for exertion B) the difference between the amount of oxygen needed for totally aerobic muscle activity and the amount actually used C) the amount of oxygen taken into the body prior to the exertion D) the amount of oxygen taken into the body immediately after the exertion
Translation
A. takes place in the nucleus. B. requires three types of DNA. C. requires the pairing of codons on mRNA with anticodons on tRNA. D. involves synthesis of RNA from DNA molecules. E. requires replication of DNA.
Which is a change in the digestive system associated with aging?
A. Thinning of the tunica muscularis B. Decreased enzyme secretion C. Decreased replacement of epithelial cells D. Decreased mucin secretion E. All of the choices are correct.
If two vectors lying in the same plane are added together and the result is zero, then which of the following is true of the vector quantities?
A. they are equal in magnitude B. they are opposite in direction C. both A and B D. none of the above