Which of the following is incorrect if blood flow to an area of the lungs is reduced while airflow remains normal?
a. The concentration of CO2 in this area decreases.
b. The change in CO2 concentration causes smooth muscles of the local airways to relax.
c. The change in CO2 concentration leads to increased resistance of local airways.
d. The change in O2 concentration leads to dilation of local blood vessels.
e. The change in O2 concentration leads to decreased vascular resistance.
B
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Which of the choices below is not a factor that promotes oxygen binding to and dissociation from hemoglobin?
A) partial pressure of oxygen B) temperature C) partial pressure of carbon dioxide D) number of red blood cells
Continuous positive airway pressure (CPAP) is one treatment for __________.
A. moderate obstructive sleep apnea B. neurological sleep apnea C. very severe obstructive sleep apnea D. apnea due to a stroke
Type I alveolar cells secrete pulmonary surfactant.
Answer the following statement true (T) or false (F)
For which type of molecule does emulsification occur before digestion begins?
A. Fat B. Protein C. Sugar D. All apply.