Chapter 25 Practice Questions
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Questions and Answers

Which of the following factors does NOT influence the percentage of body fluid?

  • Age
  • Gender (correct)
  • Amount of muscle tissue
  • Amount of adipose tissue
  • What is the approximate percentage of body fluid in infants?

  • Between 45% and 55%
  • Less than 45%
  • Between 65% and 75% (correct)
  • Between 55% and 65%
  • Which of the following body tissues has the highest percentage of water?

  • Nervous tissue
  • Adipose tissue
  • Connective tissue
  • Skeletal muscle (correct)
  • Which of the following is NOT a specific extracellular fluid?

    <p>Serous fluids within body cavity</p> Signup and view all the answers

    According to the text, if you have an increase in muscle mass as a result of weight training, will your percentage of body fluid increase, decrease, or stay the same?

    <p>Stay the same</p> Signup and view all the answers

    Which ions are more prevalent in the intracellular fluid according to the text?

    <p>Potassium ions</p> Signup and view all the answers

    What is the major distinction in the chemical composition of blood plasma and interstitial fluid according to the text?

    <p>Blood plasma contains more proteins</p> Signup and view all the answers

    When you are dehydrated, is the net movement of fluid from the blood plasma into the cells or from the cells into the blood plasma according to the text?

    <p>From the cells into the blood plasma</p> Signup and view all the answers

    What is the most important electrolyte in determining blood plasma osmolarity and regulating fluid balance?

    <p>Sodium</p> Signup and view all the answers

    Which electrolyte is the most abundant in bone and teeth?

    <p>Calcium</p> Signup and view all the answers

    What is the primary cation in the intracellular fluid (ICF)?

    <p>Potassium</p> Signup and view all the answers

    Which electrolyte is the most abundant anion in the extracellular fluid (ECF)?

    <p>Chloride</p> Signup and view all the answers

    Which of the following is NOT one of the three most important chemical buffering systems?

    <p>Carbonic acid</p> Signup and view all the answers

    What is the main function of the protein buffering system?

    <p>To minimize pH changes throughout the body</p> Signup and view all the answers

    Which of the following is the weak base in the phosphate buffering system?

    <p>Hydrogen phosphate (HPO42–)</p> Signup and view all the answers

    What is the limitation of the buffering capacity?

    <p>The amount of acid or base that the chemical buffering systems can buffer</p> Signup and view all the answers

    Which of the following is true about fluid sequestration?

    <p>Total body fluid is normal and distributed abnormally</p> Signup and view all the answers

    Which of the following is NOT a relationship between blood volume, blood pressure, and blood plasma osmolarity?

    <p>Fluid intake increases blood pressure</p> Signup and view all the answers

    What stimuli activate the thirst center?

    <p>Decreased blood volume and blood pressure</p> Signup and view all the answers

    Which hormone increases urine output?

    <p>Atrial natriuretic peptide</p> Signup and view all the answers

    Which of the following is a primary effect of angiotensin II?

    <p>Increased fluid retention</p> Signup and view all the answers

    How is antidiuretic hormone (ADH) released from the posterior pituitary?

    <p>By stimulation from angiotensin II</p> Signup and view all the answers

    What are the three actions of antidiuretic hormone (ADH)?

    <p>Decreased blood pressure, decreased urine production, increased fluid retention</p> Signup and view all the answers

    How do the effects of atrial natriuretic peptide (ANP) differ from the effects of angiotensin II, ADH, and aldosterone?

    <p>ANP decreases blood volume, while the others increase blood volume</p> Signup and view all the answers

    Which of the following is a possible cause of respiratory acidosis?

    <p>Decreased airflow due to bronchitis</p> Signup and view all the answers

    Which of the following is a possible cause of respiratory alkalosis?

    <p>Hypoxia</p> Signup and view all the answers

    What is the normal range for PCO2 in respiratory alkalosis?

    <p>Below 35 mm Hg</p> Signup and view all the answers

    Which of the following is a possible cause of metabolic acidosis?

    <p>Increased production of metabolic acids</p> Signup and view all the answers

    What is the normal range for HCO3- in metabolic acidosis?

    <p>Above 22 mEq/L</p> Signup and view all the answers

    Which group is particularly susceptible to metabolic acidosis?

    <p>Infants</p> Signup and view all the answers

    Which of the following factors does NOT influence the percentage of body fluid?

    <p>Gender</p> Signup and view all the answers

    What is the approximate percentage of body fluid in elderly individuals?

    <p>60%</p> Signup and view all the answers

    Which of the following body tissues has the highest percentage of water?

    <p>Skeletal muscle</p> Signup and view all the answers

    What is the primary cation in the intracellular fluid (ICF)?

    <p>Potassium (K+)</p> Signup and view all the answers

    Which of the following is NOT a chemical buffering system mentioned in the text?

    <p>Carbonic Acid</p> Signup and view all the answers

    What is the main function of the phosphate buffering system?

    <p>To buffer metabolic acid produced by cells</p> Signup and view all the answers

    Which of the following is the weak acid in the protein buffering system?

    <p>Carboxylic acid</p> Signup and view all the answers

    What is the most important buffering system in the extracellular fluid (ECF)?

    <p>Bicarbonate buffering system</p> Signup and view all the answers

    Which of the following is a primary effect of angiotensin II?

    <p>Increased blood volume</p> Signup and view all the answers

    What is the main function of the protein buffering system?

    <p>To regulate blood pH</p> Signup and view all the answers

    What is the normal range for PCO2 in respiratory alkalosis?

    <p>20-30 mmHg</p> Signup and view all the answers

    What is the approximate percentage of body fluid in infants?

    <p>85-90%</p> Signup and view all the answers

    Which category of fluid imbalance occurs when isotonic fluid loss is greater than isotonic fluid gain?

    <p>Volume depletion</p> Signup and view all the answers

    What is the term for water gain or retention that is greater than solute gain or retention?

    <p>Hypotonic hydration</p> Signup and view all the answers

    Which hormone is involved in regulating fluid output and is responsible for facultative water loss in the kidney nephrons?

    <p>Antidiuretic hormone (ADH)</p> Signup and view all the answers

    Which category of fluid imbalance occurs when water loss is greater than loss of solutes, resulting in water shifting from cells into interstitial fluid and blood plasma?

    <p>Dehydration</p> Signup and view all the answers

    Which of the following electrolytes is the most abundant in the extracellular fluid (ECF)?

    <p>Sodium ion (Na+)</p> Signup and view all the answers

    What is the primary cation in the intracellular fluid (ICF)?

    <p>Potassium ion (K+)</p> Signup and view all the answers

    Which of the following electrolytes is the most abundant in bone and teeth?

    <p>Calcium ion (Ca2+)</p> Signup and view all the answers

    What is the most common type of electrolyte imbalance?

    <p>Hypernatremia</p> Signup and view all the answers

    Which of the following is true about electrolytes?

    <p>Electrolytes conduct electrical current when dissolved</p> Signup and view all the answers

    What is the primary cation in the extracellular fluid (ECF)?

    <p>Sodium ion (Na+)</p> Signup and view all the answers

    What is the normal concentration range of sodium ion (Na+) in the body?

    <p>135-145 mEq/L</p> Signup and view all the answers

    Which of the following hormones decreases urine output to increase blood volume and pressure?

    <p>Angiotensin II</p> Signup and view all the answers

    Which of the following is NOT a possible cause of respiratory acidosis?

    <p>Increased breathing rate/depth</p> Signup and view all the answers

    What is the primary cause of respiratory alkalosis?

    <p>Severe anxiety</p> Signup and view all the answers

    What is the most common cause of metabolic acidosis?

    <p>Increased production of metabolic acids</p> Signup and view all the answers

    Which group is particularly susceptible to metabolic acidosis?

    <p>Infants</p> Signup and view all the answers

    What is the most important electrolyte in determining blood plasma osmolarity?

    <p>Sodium (Na+)</p> Signup and view all the answers

    Which of the following is a possible cause of respiratory alkalosis?

    <p>Severe anxiety</p> Signup and view all the answers

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