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Which ion determines the resting membrane potential of nerve and muscle?


A) Sodium
B) Calcium
C) Hydrogen
D) Potassium

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Water and chloride usually follow the movement of which cation?


A) Bicarbonate
B) Sodium
C) Potassium
D) Albumin

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Which of the following is true about these percentages: 60% and 28%? They represent the amount of


A) water eliminated as urine and through the skin and lungs.
B) Na+ and K+ reabsorbed by the kidneys in response to aldosterone.
C) water ingested through moist food and metabolism.
D) Na+ and K+ reabsorbed in response to ADH secretion.

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Under which condition will the renal reabsorption of bicarbonate increase?


A) As a compensatory mechanism for respiratory acidosis
B) Whenever blood pH exceeds 7.45
C) As a compensatory mechanism for metabolic alkalosis
D) Whenever a person hyperventilates

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Which of the following is true about interstitial fluid,plasma,lymph,and transcellular fluid?


A) Contain no electrolytes
B) Protein-free fluids
C) Classified as extracellular
D) pH less than 6 (highly acidic)

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Which of the following is descriptive of normal saline?


A) Distilled water
B) 0.9% sodium chloride
C) Highly acidic
D) Contains albumin

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A patient with pulmonary edema is receiving furosemide (Lasix) ,a kaliuretic diuretic.He has lost 6.6 lb over a 48-hr period.Which of the following statements is true?


A) He is probably hyperkalemic secondary to the diuretic therapy.
B) He has lost 12 L of water.
C) His skin is "tenting."
D) He has lost 3 L of water.

Correct Answer

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Which of the following is not a function of the lungs?


A) Oxygenation of blood
B) Excretion of carbon dioxide
C) Secretion of aldosterone and the regulation of Na+
D) Regulation of blood pH

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A patient is ventilating at a rate of 8 to 10 respirations/min,having been heavily medicated for pain.Which of the following is true? The patient is (may)


A) develop a respiratory acidosis.
B) experiencing Kussmaul respirations.
C) experiencing diuresis.
D) likely to develop a metabolic alkalosis.

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Which condition is caused by vomiting stomach contents?


A) Hyperkalemia
B) Hypernatremia and blood volume expansion
C) Hypocalcemic tetany
D) Alkalosis

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Which of the following is most apt to cause a hypocalcemic tetany?


A) Hyperventilation
B) Rapid and excess fat catabolism
C) Metabolic acidosis
D) pH < 7.35

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A change of pH from 7.40 to 7.25


A) is indicative of expanded blood volume.
B) is indicative of alkalosis.
C) reflects an increase in the amount of H+ in the blood.
D) is within normal limits.

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A drug that blocks the renal reabsorption of sodium


A) decreases the renal excretion of Na+.
B) increases the amount of urine.
C) decreases the excretion of bicarbonate.
D) always increases the reabsorption of K+.

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A drug that decreases the synthesis of aldosterone


A) decreases blood pressure.
B) causes hypernatremia.
C) causes hypokalemia.
D) does all of the above.

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Excessive secretion of ADH,as occurs with head injury,is most likely to cause


A) tenting.
B) blood volume expansion.
C) diuresis.
D) hypernatremia.

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Which of the following is characteristic of acidosis?


A) pH of 7.55
B) A decrease in the concentration of hydrogen ion in the blood
C) Urinary excretion of bicarbonate
D) pH less than 7.35

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