I'm going to hold my breath until I turn blue and stop breathing and die and it will be all
your fault shrieked the 6-year-old at her father. The child was unable to carry out her
threat because
A) she could not take in enough oxygen.
B) increased CO2 and hydrogen ion concentration and decreased oxygen concentration
stimulate chemoreceptors.
C) decreased CO2 and hydrogen ion concentration and increased oxygen concentration
stimulate chemoreceptors.
D) she never stopped talking long enough to try to hold her breath.
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Question 2) Which choice describes the countercurrent mechanism of the nephron loop?
A) Water moves out of the ascending limb; sodium moves in the ascending limb
B) Water moves in the ascending limb; sodium moves out of the ascending limb
C) Water moves in the descending limb; sodium moves out of the descending limb
D) Water moves out of the descending limb; sodium moves out of the ascending limb
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Question 3) Intracellular fluids have high concentrations of
A) potassium and phosphate ions. B) sodium and phosphate ions.
C) chloride and potassium ions. D) sodium and chloride ions.
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Question 4) The respiratory control areas are in the
A) pons and medulla oblongata. B) hypothalamus and hippocampus.
C) alveoli. D) cerebral cortex.
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Question 5) Kwashiorkor may develop in children who have dietary deficiencies of
A) proteins. B) carbohydrates.
C) fiber. D) lipids.
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Question 6) Which of the following is a normal constituent of urine?
A) Creatinine B) Water
C) All of the above D) Urea
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Question 7) Which trace element and function is correctly matched?
A) Iodine:constituent of several enzymes involved in digestion
B) Iron:part of hemoglobin molecule
C) Zinc:needed in blood clotting process
D) Manganese:essential component for synthesis of thyroid hormones
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Question 8) Extracellular fluids have relatively
A) low sodium and high potassium ion concentrations.
B) low sodium and low potassium ion concentrations.
C) high sodium and low potassium ion concentrations.
D) high sodium and high potassium ion concentrations.
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Question 9) A sudden inspiration caused by a spasmodic contraction of the diaphragm while the
glottis is closed is a
A) laugh. B) sneeze. C) yawn. D) hiccup.
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Question 10) The inverse relationship between pressure and volume is known as
A) Starlings's law. B) Boyle's law.
C) Dalton's law. D) Newton's law.
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