Jake told his girlfriend that the rollercoaster did not bother him, but during the ride he let loose with a long, high-pitched scream. Explain how the muscles of respiration, the muscles that control the vocal folds, and the muscles that move the epiglottis produced Jake’s scream.
Predict 5
Jake told his girlfriend that the rollercoaster did not bother him, but during the ride he let loose with a long, high-pitched scream. Explain how the muscles of respiration, the muscles that control the vocal folds, and the muscles that move the epiglottis produced Jake’s scream.
Predict 6
Explain what happens to the shape of the trachea when a person swallows a large mouthful of food. Why is this change of shape advantageous?
Predict 7
What is the alveolar ventilation of a resting person with a tidal volume of 500 ml, a dead space of 150 ml, and a respiratory rate of 12 breaths per minute? Suppose the person exercises, so that tidal volume increases to 4000 ml, dead space increases to 300 ml due to dilation of the respiratory passageways, and respiratory rate increases to 24 breaths per minute. What is the alveolar ventilation then? How is the change in alveolar ventilation beneficial for doing exercise?
Predict 8
Even people in “good shape” may have trouble breathing at high altitudes. Explain how this can happen, even when ventilation of the lungs increases.
Predict 9
In carbon monoxide poisoning, CO binds to hemoglobin, thereby decreasing the uptake of oxygen by hemoglobin. In addition, when CO binds to hemoglobin, the oxygen-hemoglobin dissociation curve shifts to the left. How does this shift the ability of tissues to get oxygen? Explain.
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