Osmosis and Water Proportion in the Human Body
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Questions and Answers

What is the primary mechanism by which water moves through semi-permeable membranes?

  • Active transport
  • Simple diffusion
  • Facilitated diffusion
  • Osmosis (correct)

Which body part has the lowest proportion of water content?

  • Intracellular fluid
  • Teeth (correct)
  • Kidney
  • Brain

Which fluid compartment makes up 60% of total water in humans and has a stable volume?

  • Plasma in blood
  • Intracellular fluid (correct)
  • Cerebrospinal fluid
  • Extracellular fluid

What is the main function of the sodium-potassium pump in cells?

<p>Balancing the cell for action potential (B)</p> Signup and view all the answers

What occurs during diuresis?

<p>Production of excess urine (C)</p> Signup and view all the answers

In a dehydrated person, how does ADH production compare to that of a person with excess water?

<p>ADH production increases (D)</p> Signup and view all the answers

What is the primary cause of hyponatremia?

<p>Excessive water accumulation (A)</p> Signup and view all the answers

Which condition can cause hypokalemia?

<p>Starvation (D)</p> Signup and view all the answers

What is the consequence of hyperkalemia on the nervous system?

<p>Impaired nervous system function (A)</p> Signup and view all the answers

Which condition is associated with hypocalcemia?

<p>Removal of thyroid gland (C)</p> Signup and view all the answers

What is the role of bicarbonate in the blood?

<p>Maintaining acid-base balance as part of the buffer system (A)</p> Signup and view all the answers

How does the respiratory tract regulate pH when CO2 levels rise?

<p>By reacting with water to create carbonic acid (A)</p> Signup and view all the answers

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