Effects of Low Calcium Levels on the Body

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Questions and Answers

What is the primary effect of a decrease in parathyroid hormone (PTH) levels?

  • Increase in magnesium reabsorption
  • Decrease in calcium absorption
  • Increase in bone density (correct)
  • Decrease in phosphate reabsorption

Which of the following is NOT a common symptom of hypocalcemia (low calcium levels)?

  • Tetany
  • Increased heart rate (correct)
  • Muscle spasms
  • Convulsions

What is the primary function of phosphate in the body?

  • Maintenance of extracellular fluid volume
  • Regulation of acid-base balance
  • Reabsorption in the kidneys
  • Formation of ATP and cell membranes (correct)

What is the primary cause of metabolic acidosis?

<p>Excessive production of metabolic acids (A)</p> Signup and view all the answers

What is the primary effect of a decrease in pH on the body?

<p>Disruption of cell membrane stability (D)</p> Signup and view all the answers

Which of the following electrolyte imbalances is the most rare?

<p>Magnesium imbalance (B)</p> Signup and view all the answers

What is the approximate percentage of total body fluid that is found in the extracellular fluid (ECF) compartment of a healthy adult?

<p>33% (B)</p> Signup and view all the answers

Which of the following is the major cation found in the intracellular fluid (ICF) compartment?

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

If a patient has a fluid volume deficit, which of the following mechanisms would help restore fluid balance?

<p>Increased water intake (D)</p> Signup and view all the answers

Which of the following statements about the regulation of fluid and electrolyte balance is true?

<p>Water movement occurs passively in response to changes in solute concentration. (A)</p> Signup and view all the answers

If a patient has an acid-base imbalance, which of the following electrolytes would likely be affected?

<p>Bicarbonate (B)</p> Signup and view all the answers

What is the approximate percentage of total body water found in the plasma component of the extracellular fluid (ECF) compartment?

<p>20% (B)</p> Signup and view all the answers

Which of the following is NOT a major buffer system in the human body?

<p>Phosphoric acid buffer system (C)</p> Signup and view all the answers

What is the primary function of buffer systems in the body?

<p>To maintain the body's pH balance (homeostasis) (C)</p> Signup and view all the answers

Which of the following statements about the hemoglobin buffer system is correct?

<p>It involves the enzyme carbonic anhydrase in red blood cells (RBCs) (D)</p> Signup and view all the answers

Which of the following statements about the carbonic acid-bicarbonate buffer system is correct?

<p>It involves the dissociation of carbonic acid into hydrogen ions (H+) and bicarbonate ions (HCO3-) (A)</p> Signup and view all the answers

What is the role of the kidneys in maintaining acid-base balance?

<p>Excretion of excess hydrogen ions (H+) (C)</p> Signup and view all the answers

Which of the following statements about the phosphate buffer system is correct?

<p>It is important in the intracellular fluid (ICF) (B)</p> Signup and view all the answers

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