Which of the following causes a decrease in the PO2 of air as it enters the conducting zone of the lungs?
A) warming of the air
B) decreasing alveolar PO2
C) the consumption of oxygen
D) humidifying the air
E) the increasing PCO2
Answer: D) humidifying the air
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What will be an ideal response?
Portuguese water dogs have evolved to spend a lot of time in water and thus have webbed
feet. What process does not occur in these dogs but does occur in other dogs that do not have webbed feet?
a. apoptosis b. mitosis c. cell differentiation d. signaling pathways
Tobacco smoke:
a. exposes the smoker to less than 10 carcinogens b. presents more of a risk to male smokers than to female smokers c. takes a long time to manifest in a decrease of respiratory function d. increases respiratory infections e. increases carbon dioxide blood levels but decreases carbon monoxide blood levels
If a child has blood type AB, he or she could NOT have been produced by which set of parents?
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