Water and Electrolyte Balance in the Human Body
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Questions and Answers

What is a dissolved substance in water called?

  • Electrolyte
  • Solute (correct)
  • Hydrate
  • Solvent
  • Which body part has the highest proportion of water?

  • Brain
  • Kidneys (correct)
  • Heart
  • Lungs
  • What is the main function of the sodium-potassium pump?

  • Using ATP to move sodium out of a cell and potassium into a cell (correct)
  • Pumping sodium into a cell
  • Balancing water levels in the body
  • Maintaining high potassium levels in the ECF
  • How do solutes move passively across membranes?

    <p>Due to concentration gradients or facilitated transport</p> Signup and view all the answers

    What does dehydration mean?

    <p>Too little fluid in body tissues</p> Signup and view all the answers

    Why are signals sent to increase thirst?

    <p>To respond to increased blood plasma osmolarity</p> Signup and view all the answers

    What signals are sent to the salivary glands in a dehydrated state?

    <p>Decrease saliva production</p> Signup and view all the answers

    Which electrolyte is responsible for half of the osmotic pressure gradients between the cell interior and the extracellular space?

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

    What is the primary function of phosphate in the body?

    <p>Serve as a buffer</p> Signup and view all the answers

    Which condition results from too much potassium in the body?

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

    What is the primary role of bicarbonate in the blood?

    <p>Balance acid-base levels</p> Signup and view all the answers

    What pH value is considered neutral on the pH scale?

    <p>7</p> Signup and view all the answers

    Which system controls the balance of acids and bases within minutes?

    <p>Respiratory system</p> Signup and view all the answers

    What happens to blood pH if hydrogen ions are being captured by sulfates, phosphates, or ammonia?

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

    What is a symptom of physiological acidosis?

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

    Which electrolyte is important for muscle contraction and blood coagulation?

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

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