Answer:
The correct answer is intrapulmonary pressure; atmospheric pressure.
Explanation:
Inspiration is the process in which air is inhaled from the outside environment into the lungs of the body, in order to obtain the necessary oxygen to carry out metabolic processes. Alveolar or intrapulmonary pressure is the pressure of the air contained within the lungs (alveoli). The increase in volume inside the chest created during inspiration implies a decrease in the pressure inside the alveoli (alveolar pressure) below atmospheric pressure (negative pressure breathing), making it possible for air to enter through the air ways. The rib cage due to the shape of the ribs, the diaphragm and the myofascial organization of the hypaxial elements pulls outward exerting negative pressure (with respect to atmospheric) in the thoracic compartment, creating the air flow from the outside to the inside.
