The four most abundant elements in the human body are
A. calcium, hydrogen, sodium, and potassium.
B. carbon, oxygen, magnesium, and zinc.
C. carbon, hydrogen, oxygen, and nitrogen.
D. carbon, hydrogen, oxygen, and iron.
E. carbon, sulfur, calcium, and potassium.
Answer: C
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A cell that contains 23 pairs of chromosomes is
A. polyploid. B. diploid. C. haploid. D. monoid.
Why does running downhill tend to increase running speed?
A. increased stride length B. increased stride frequency C. both A and B D. none of the above
Match the descriptions to the correct protein category.
1. soluble in water 2. keratin 3. disulfide bond 4. lipid carriers 5. structural components A. fibrous B. globular
The study of surface anatomy attempts to relate, among other things,
A) the size and strength of the muscles near or at the surface of the body. B) structure to the age of the individual. C) physical and physiological conditions in an individual. D) the structure and location of the skeletal and muscular systems. E) None of the answers are correct.