Increasing blood concentrations of carbon dioxide and hydrogen ions have similar effects
upon the respiratory areas due to
A) both increasing pH and inhibiting the respiratory areas.
B) their similarity in chemical structure, inhibiting the respiratory rate.
C) an increase in carbon dioxide, increasing hydrogen ions.
D) both chemically bonding, decreasing the respiratory rate.
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Question 2) Human prenatal development takes ___ weeks.
A) 44 B) 38 C) 32 D) 28
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Question 3) A person in a moderate environment would lose the greatest volume of water in
A) sweat. B) feces. C) urine. D) mucus.
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Question 4) Glomerular filtration produces about ________ liters of fluid in twenty-four hours.
A) 180 B) 144 C) 40 D) 96
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Question 5) Good general dietary advice for athletes is to eat
A) 60 or more carbohydrates, mostly from grains and vegetables.
B) only two large meals a day, with no snacks.
C) much more protein than non-athletes.
D) about equal amounts of the three macronutrients.
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Question 6) The composition of glomerular filtrate differs from that of plasma by including
A) the same substances as plasma except for larger protein molecules.
B) many different substances that are absent from plasma.
C) much more uric acid and creatinine than plasma.
D) less water and electrolytes than does plasma.
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Question 7) Max works out about an hour every day, using aerobic machines at a gym. During his
moderate physical exercise, blood concentrations of
A) oxygen decrease and carbon dioxide increase.
B) oxygen and carbon dioxide increase.
C) oxygen increase and carbon dioxide decrease.
D) oxygen and carbon dioxide remain nearly unchanged.
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Question 8) The head of a sperm is mostly
A) cytoskeleton. B) mitochondria.
C) cell membrane. D) nucleus.
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Question 9) Dietary supplements include dietary ingredients such as
A) an herb. B) all of the above.
C) a vitamin. D) an amino acid.
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Question 10) The number of sperm cells that form from a primary spermatocyte is
A) 46. B) 4. C) 100. D) 16.
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