22. Respiratory System

Oxygen loading and unloading

Gas Transport

Oxygen - Haemoglobin Dissociation Curve - Physiology

 Just over 20% of carbon dioxide binds chemically to the amino acids of hemoglobin to form carbaminohemoglobin. 

 Approximately 20% of carbon dioxide is transported in the blood as __________. 

Carbon Dioxide Transport

 The partial pressure of oxygen in the alveoli is approximately 104 millimeters of mercury, which is about 35% less than that of the atmospheric PO2. 

 lower than the PO2 of systemic venous blood  

 much higher than the PO2 of systemic arterial blood  

 equal to the PO2 of systemic venous blood 

 approximately 104 millimeters of mercury 

 In the alveoli, the partial pressure of oxygen is __________. 

The Bohr effect states that CO2 loading and lower pH enhance O2 release.

 partial pressures of carbon dioxide are lower 

 Hemoglobin has a tendency to release oxygen where __________. 

BioFlix Gas Exchange

Blood transports CO2 from the tissue cells to the lungs in three forms:<ol type="1">	<li>Dissolved in plasma (7–10%). The smallest amount of CO2 is transported simply dissolved in plasma.</li>	<li>Chemically bound to hemoglobin (just over 20%). In this form, dissolved CO2 is bound and carried in the RBCs as carbaminohemoglobin.</li>	<li>As bicarbonate ion in plasma (about 70%). Most carbon dioxide molecules entering the plasma quickly enter RBCs, where most of the reactions that prepare carbon dioxide for transport as bicarbonate ions in plasma occur.</li></ol>

Which form of CO2 transport accounts for the greatest amount of CO2 transported in blood?

 converted to bicarbonate ions and transported in plasma 

Seventy percent of CO2 is converted to bicarbonate ions and transported in plasma.

 Most of the carbon dioxide transported by the blood is __________. 

Oxygen Transport

Transport of Carbon Dioxide in Blood

Oxygen transport - methods and oxyhemoglobin

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1. Introduction to A&P

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9. Muscles and Muscle Tissue

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14. Autonomic Nervous System

15. Special Senses

16. Endocrine System

17. Blood

18. Cardiovascular System: the Heart

19. Cardiovascular System: Blood Vessels

20. Lymphatic System

21. Immune System

23. Digestive System

24. Nutrition, Metabolism, Energy Balance

25. Urinary System

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Conducting and respiratory zone structures

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Gross structure of the lungs and pleurae

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