KINE 3012 Lecture Notes - Lecture 7: Partial Pressure, Hemoglobin, Mount Everest
3 Dec 2013
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Document Summary
Hb acting as a sink to keep oxygen pressure high at the tissues to facilitate oxygen transfer. If we have a hemoglobin in b, it absorbs 4 molecules, and it doesn"t count as pressure. Oxygen molecules travel from high pressure gradient to low pressure gradient. Hemoglobin = cookie jar and it allows you to add more cookies, as you eat cookies, they start taking cookies out. Mom keeps adding cookies until the kids are full, the cookie jar fills up and mom stops. Now you got 2 pools of oxygen, cookies in the kid"s stomach, and cookies in the jar. Oxygen is carried as a store in hemoglobin and cookies in the blood. This what happens with the tissue, when the dissolved oxygen in the blood drops, hemoglobin releases more dissolved oxygen into the blood. This allows it to keep oxygen level high, while keeping oxygen pressure low. Total amount of hb determines the amount of oxygen we can carry.
