BIOL-2230 Lecture Notes - Lecture 17: Bronchiole, Intercostal Nerves, Chronic Obstructive Pulmonary Disease
15 Mar 2017
School
Department
Course
Professor
Document Summary
6x tidal volume force extra air out of our lungs (cid:272)a(cid:374)"t (cid:373)easure this u(cid:374)less (cid:455)ou"re dead. Do(cid:374)"t (cid:374)e(cid:272)essaril(cid:455) (cid:272)o(cid:374)tri(cid:271)ute to gaseous e(cid:454)(cid:272)ha(cid:374)ge all of the air in our lungs all 4 of the volumes. All the air we bring into our lungs. Tidal volume plus inspiratory reserve volume air that normally stays behind expiratory reserve volume plus residual volume total amount of exchangeable air. Atmosphere is comprised of a number of different gases. Pressure in lungs must be below atmospheric pressure for inhaling. 1 atmospheric pressure is 760mmhg being exerted on our body. We have less nitrogen and oxygen in our lungs. From alveoli to bloodstream because it moves from high to low pressure. Equilibrium is for lungs to off-load the oxygen. Carbon dioxide has a really low pressure gradient. Despite what you would think due to pressure gradients . Greater gradient = more exchange we will see.
