Calcium and Cellular Function Quiz
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Questions and Answers

Which ions are found in the extracellular fluid (ECF)?

  • Na+, K+, Cl-, protein
  • Ca2+, Na+, Cl-, K+, protein
  • Ca2+, K+, Cl-, protein
  • Na+, K+, Mg2+, Cl-, PO43-, HCO3-, glucose, protein (correct)

    • Why do cells erect a barrier that is impermeable to ions?

  • To increase the concentration of K+ in ICF
  • To separate intracellular fluid (ICF) from ECF (correct)
  • To lower the concentration of Ca2+ in ICF
  • To increase the concentration of Na+ in ICF

    • What is the approximate concentration of free calcium (Ca2+) in the extracellular fluid (ECF)?

  • 10^-7 mol
  • 10^-4 mol
  • 2 mmol (correct)
  • 2 mmol/L

    • How does the composition of intracellular fluid (ICF) differ from extracellular fluid (ECF)?

    <p>Lower Ca2+, Na+, Cl- concentrations and higher K+ concentration</p> Signup and view all the answers

    What is the pH of intracellular fluid (ICF) compared to extracellular fluid (ECF)?

    <p>Slightly more acidic</p> Signup and view all the answers

    Which of the following ions is NOT found in the extracellular fluid (ECF)?

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

    What is the approximate concentration of free calcium (Ca2+) in the extracellular fluid (ECF)?

    <p>2 mmol</p> Signup and view all the answers

    Which ion has a higher concentration in intracellular fluid (ICF) compared to extracellular fluid (ECF)?

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

    What is the primary function of the plasma membrane?

    <p>To separate intracellular fluid (ICF) from extracellular fluid (ECF)</p> Signup and view all the answers

    What is the pH of intracellular fluid (ICF) compared to extracellular fluid (ECF)?

    <p>More acidic</p> Signup and view all the answers

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