Chapter 17 Mastering.docx - Chapter 17 Mastering 1. A human...

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Chapter 17 Mastering1.A human body consumes 25mL of oxygen per minute2.Oxygen is transported in the blood by being dissolved in plasma and bound tohemoglobin3.Carbon dioxide is transported in the blood by being converted to bicarbonate, boundto hemoglobin, and dissolved in plasma.4.a.Partial Pressure of Oxygen in the pulmonary veins/Systemic arterioles:100mmHgi.In systemic veins: 40mmHgii.In pulmonary Arteries: 40mmHg (75% saturated)b.Partial Pressure of Carbon dioxide in pulmonary veins/systemic arterioles:40mmHgi.In systemic veins: 46mmHg5.In the lungs, bicarbonate combines with hydrogen ions to form carbonic acid, whichcarbonic anhydrase then converts into carbon dioxide and water6.During inhalation, the diaphragm and rib muscles contract7.Under normal conditions, the oxygen carrying capacity of hemoglobin is about200mL of oxygen/L of blood
8.In systemic arteries at 100mmHg, the percentage saturation of hemoglobin is 98%9.Starvation would cause metabolic acidosis with respiratory compensationNormal range in plasmaAcid-Base DisturbancepH7.35-7.45PCO235-45mmHgHCO3−22-26mEq/LRespiratory acidosisifcompensatingRespiratory alkalosisifcompensatingMetabolic acidosis(starvation and diarrhea)ifcompensatingMetabolic alkalosisifcompensating10. Diarrhea can lead to metabolic acidosis with respiratory compensation11.A decrease in PCO2causes constriction of the bronchioles and dilation of thepulmonary arterioles12. The Ventral Respiratory Group in the brain sets the respiratory rhythm (VRG)13. Inspiratory neurons send information to the diaphragm via the phrenic nerve14.H+directly stimulates the central chemoreceptors, thus increasing respiration

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