1. In internal respiration _______. A. pulmonary exchange of gases across the respiratory membrane occurs B. air exchang

[answerhappygod]

1. In internal respiration _______.
A. pulmonary exchange of gases across the respiratory membrane
occurs
B. air exchange between the atmosphere and the alveoli
occurs
Both A and B occur
2. In the pause between inhalation and exhalation, ______.
atmospheric pressure is higher than that in the alveoli
atmospheric pressure and pressure within the alveoli are
equal
atmospheric pressure is lower than that in the alveoli
pressure in the lungs doesn’t exist
None of the above are correct.