1-When intra-alveolar pressure exceeds atmospheric pressure, ______________.
A. air moves out of the lung
B. air moves into the lung
C. the lung must be expanding
D. the lung collapses
2- What occurs when blood reaches the tissues?
A. Bicarbonate moves out of red blood cells
B. CO2 becomes bound to hemoglobin in the heme region
C. The PCO2 of the blood increases to 100 mmHg
D. There is a net production of H2CO3 from H+ and HCO3
3-What happens when blood reaches the lungs