Question

Boyle's Law
@somy

Answer 1

[1/13/16, 2:29:54 AM] pensive nincompoop: so when you say that the pressure of the air in the atmosphere and the pressure inside the lungs are equal before inhalation at 760 mmHg, the lowering of the pressure in the lungs is achieved by increasing the size of the lungs. Remember Boyle's Law. The expansion of the lungs involves the contraction of the diaphragm and external intercostal . The diaphragm is responsible for about 75% of the air entering the lungs during quiet breathing as it descends about 1 cm producing pressure difference of about 1-3 mmHg and inhalation of about 500 mL of air, and the external intercostal is responsible for the 25% when it contracts they elevate the ribs increasing the anteroposterior and diameter of the chest cavity. During this inhalation, the intrapleural cavity pressure is about 4 mmHg of the the atmospheric pressure.
[1/13/16, 2:34:44 AM] pensive nincompoop: The increase in the volume of the lungs, the alveolar pressure, the pressure inside the lungs, drops from 760 to 758 mmHg and that is how the pressure difference between the atmosphere in the air outside and alveoli is established. Then we follow basic science about diffusion and that pertains to the flow of gradient from higher concentration to lower concentration.
[1/13/16, 2:36:56 AM] pensive nincompoop: exhaling is passive as you may have probably learned and the process creates about 762 mmHg
[1/13/16, 2:46:43 AM] pensive nincompoop: the fluid that you were referring to might be the alveolar fluid that coats the luminal surface of alveoli that also exerts surface tension. Surface tension occurs due to properties of water molecules tending to be more attracted to each other than water to air. Remember that water molecules are polar. This surface tension causes the alveoli to assume the smallest possible diameter. The breathing process, the surface tension must be overcome to expand the lungs and what reduces the surface tension is a mixture of phospholipids and lipoproteins that we refer to as surfactants and it reduces just below the surface tension of water.

Answer 2

I think i get it now, i want u to hear me out just to make sure i did get it right lol
thnx for explaining buddy <3

Answer 3

okay tell me the part you want me to hear

Answer 4

ill tell you in a call some time later if u dont mind?