UNIT II
Assignment
A. Respiratory Gas Exchange
1. Atmospheric Pressure - is the one that holds the air or atmosphere on Earth.
*** Note: We are immersed in a fluid, the atmosphere, therefore, we are under pressure, this is known as atmospheric pressure. Pressure is high but we are so accustomed to it that neither we learned. Because we can not calculate a gas through the principle p fundamental but odem measured experimentally. The first measure was Torricelli in the seventeenth century.
2. intrapulmonary pressure - is equal to the d and the atmosphere (760 mmHg at sea level) at the end of the inhalation and exhalation. At the start of inspiration, intrapulmonary pressure decreases and that they enter the air (758 mmHg) as the flow enters the pressure equalizes until the intrapulmonary pressure is increased (762 mmHg) and forces air exit.
3. intrapleural pressure - is always negative or less than atmospheric (-3mmHg) at the end of inspiration. This is the result of the elasticity of the lungs tend to collapse and the chest cavity is to keep expanding. During inspiration the negative pressure increases to -5 mmHg. If pressure becomes positive, the lungs collapse.
4. spirogram of volumes and capacities
B. Transportation Blood Gases
1. Definition Blood - Tissue composed of red cells, white cells, platelets and other substances suspended in fluid called plasma. Blood carries oxygen and nutrients to tissues and removes wastes.
i. Erythrocytes - are blood cells that contain hemoglobin inside. Red blood cells are the main carriers of oxygen to cells and tissues. They have a concave shape to accommodate a larger surface of exchange of oxygen for carbon dioxide in the tissues. Furthermore the membrane is flexible, allowing red blood cells pass through the narrowest capillaries.
ii. Hemoglobin - is an iron-containing protein that gives blood its red color.
C. Physiological Needs Blood
1. Molecular Structure
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