The Respiratory System

The Respiratory System - The Respiratory System Oxygen...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
The Respiratory System Oxygen Transport Most (98.5%) oxygen is transported bound to hemoglobin. Some (1.5%) oxygen is transported dissolved in plasma. Oxygen is released from hemoglobin in tissues when the partial pressure for oxygen is low, the partial pressure for carbon dioxide is high, pH is low, and temperature is high. Carbon Dioxide Transport and Blood pH Carbon dioxide is transported as bicarbonate ions (70%), in combination with blood proteins (23%), and in solution in plasma (7%). In tissue capillaries, carbon dioxide combines with water inside the erythrocytes to form carbonic acid that dissociates to form bicarbonate ions and hydrogen ions. This reaction promotes the transport of carbon dioxide. In lung capillaries, bicarbonate ions combine with hydrogen ions to form carbonic acid. The carbonic acid dissociates to form carbon dioxide that diffuses out of the erythrocytes. As blood carbon dioxide levels increase, blood pH decreases; as blood carbon
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/04/2011 for the course ANTHRO 2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.

Page1 / 2

The Respiratory System - The Respiratory System Oxygen...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online