Gas Exchange and Transport | Study Guide - Edubirdie

University:
Glendale Community College
Course:
BIO160 | Introduction to Human Anatomy and Physiology
Academic year:

2022
Views:

156

Pages:

4
Author:

nugatave

Carbon Dioxide Transport • 90% as carbonic acid and bicarbonate CO2 + H2O  H2CO3  HCO3- + H+ • 5% as carbaminohemoglobin (HbCO2) CO2 binds to amino groups of Hb (and plasma proteins) • 5% as dissolved gas in water of plasma Alveolar Gas Exchange Gas Exchange in Tissues Carbon Monoxide (CO) • CO is a colorless, odorless gas that has a higher affinity for Hb than CO2 or O2 which makes it lethally toxic at a concentration of only 0.2% in the air. • Hb is bright red when bound to CO as seen in packaged meats and in the “ruddy” complexion of smokers. • CO is produced from incomplete combustion, as from a smoldering fire (cigarette) or a kerosene heater used in a closed room. • CO can be removed from Hb by increasing the ppO2 as in a hyperbaric chamber. -

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