BIOLOGY 171 Study Guide - Hemoglobin
Document Summary
Atmospheric gases and partial pressures: gases move by diffusion, gases move down a gradient of partial pressure, partial pressure (p) of a gas reflects the number of molecules present and their thermodynamic energy, pressure is a measure of force (mm hg) Carbonic anhydrase buffers blood ph: co2 is converted to bicarbonate ions and h, induces bohr shift in hemoglobin (enhances release of oxygen, reduces partial pressure of co2 in blood (enhances diffusion out of tissues) Animals with a closed circulatory system have blood vessels and a heart to pump blood in a continuous loop: hearts contain at least two chambers: atrium (receives blood) and ventricle (generates force to pump blood) separated by valves, blood circulates through gills or lungs and tissues of the body, blood pressure drops as it moves through the many capillaries in the lungs > > low pressure system needed for pulmonary circulation, second high pressure system needed for systemic circulation to the body.
