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Find a nearly continuous flow of substances back

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If we inspect most cell membranes in a living human body, we would find a nearly continuous flow of substances back and forth across the plasma membrane. Which of the following explains this continuous flow?

Multiple Choice

  • Cell metabolism is constantly using up oxygen and raw materials; this lowers their concentration, so more will diffuse into the cell.
  • Cell metabolism is constantly producing waste molecules; this increases their concentration, so more will diffuse into the cell.
  • Cells produce useful secretions; this increases their concentration, and more will diffuse into the cell.
  • Cell metabolism constantly produces oxygen in respiration; this increases the cell's affinity for carbon dioxide which diffuses into the cell.

Cells are non-living and therefore anything can pass in and out of the cell.

Reference no: EM132383505

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