6. Partial pressure differences determine gas exchange a. According to law, each gas in a mixture of gases exerts its own pressure as if no other gases were present. b. During external (pulmonary)...

Extracted text: 6. Partial pressure differences determine gas exchange a. According to law, each gas in a mixture of gases exerts its own pressure as if no other gases were present. b. During external (pulmonary) respiration oxygen diffuses from alveolar air, where its partial pressure is mmHg, into the deoxygenated blood in pulmonary capillaries, where Po2 is _mmHg. Carbon dioxide diffuses from deoxygenated blood, where its partial pressure is mmHg, into alveolar air, where Pco2 is mmHg. c. During internal (systemic gas exchange) respiration oxygen diffuses from the systemic capillaries, where its partial pressure is mmHg, into tissue cells, where Po2 is _mmHg. Carbon dioxide diffuses from tissue cells, where its partial pressure is mmHg, into systemic capillaries, where Pco2 is _mmHg. 7. Transport of oxygen and carbon dioxide a. 98.5% of oxygen is transported by whereas 1.5% is found inside b. 70% of carbon dioxide is transported as 23% as and 7% dissolved in 8. Factor affecting the affinity of hemoglobin for oxygen a. Briefly describe how the following 4 factors affect the affinity of hemoglobin for oxygen: i. Bohr effect - ii. Carbon dioxide - iii. Temperature - iv. 2,3-bisphosphoglycerate - b. Fetal hemoglobin has affinity for O2 compared to adult hemoglobin.