What is true about the sex chromosomes?
A) Normal males possess two sex chromosomes that look the same, X and X.
B) Normal females possess two sex chromosomes that look different, X and Y, and normal males possess two sex chromosomes that look the same, X and X.
C) Normal females possess two sex chromosomes that look different, X and Y.
D) Possession of the Y chromosome determines maleness.
Answer: D
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B-lymphocytes make up the largest population of lymphocytes in the body, about 70?85% of the total number.
Answer the following statement true (T) or false (F)
The molecule DNA contains a five-carbon sugar called
A) glucose. B) fructose. C) maltose. D) ribose. E) deoxyribose.
Which of the following statements is true regarding fluid shifts?
A) Nonelectrolytes are the controlling factor in directing fluid shifts. B) Electrolytes are not as important as proteins in regulating fluid shifts in the body. C) Electrolytes have greater osmotic power than nonelectrolytes and therefore have the greatest ability to cause fluid shifts. D) There are always more positive electrolytes than negative in a solution; it is therefore impossible to follow fluid shifts.
Cardiac muscle can only use glucose as a source of organic fuel
Indicate whether the statement is true or false