Other questions in this quiz

2. most CO2 is transported in the blood:

  • as bicarbonate
  • loosley bound to the iron molecule in heme
  • by the hemoglobin, as carbaminohemoglobin
  • by megakaryocytes

3. across which structure(s) does most gas exchange occur?

  • trachea
  • alveoli
  • bronchus
  • bronchioles

4. frontal, maxillary, sphenoidal, and ethmoidal:

  • paranasal sinuses
  • all lined with serous membranes
  • saliva secreting glands
  • bones of the thorax

5. which of the following structures prevents entrance of food and water into the respiratory passages?

  • larynx
  • epiglottis
  • glottis
  • thyroid cartilage

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