Topic D.6: Transport of Respiratory Gases
Essential Idea: Red blood cells are vital in the transport of respiratory gases.
At SHS, Topic D.6 is taught in the following class unit(s):
Statements & Objectives:
D.6.U1 Oxygen dissociation curves show the affinity of hemoglobin for oxygen.
D.6.U2 Carbon dioxide is carried in solution and bound to hemoglobin in the blood.
D.6.U3 Carbon dioxide is transformed in red blood cells into hydrogen carbonate ions.
D.6.U4 The Bohr shift explains the increased release of oxygen by hemoglobin in respiring tissues.
D.6.U5 Chemoreceptors are sensitive to changes in blood pH.
D.6.U6 The rate of ventilation is controlled by the respiratory control centre in the medulla oblongata.
D.6.U7 During exercise the rate of ventilation changes in response to the amount of CO2 in the blood.
D.6.U8 Fetal hemoglobin is different from adult hemoglobin allowing the transfer of oxygen in the placenta onto the fetal hemoglobin.
D.6.A1 Consequences of high altitude for gas exchange.
D.6.A2 pH of blood is regulated to stay within the narrow range of 7.35 to 7.45.
D.6.A3 Causes and treatments of emphysema.
D.6.S1 Analysis of dissociation curves for hemoglobin and myoglobin.
D.6.S2 Identification of pneumocytes, capillary endothelium cells and blood cells in light micrographs and electron micrographs of lung tissue.
D.6.NOS Scientists have a role in informing the public—scientific research has led to a change in public perception of smoking.
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