18. In any given tissue bed, the intracellular partial pressure of 0, (pO,) would be ultimately dependent on: A. the number of cells within that tissue bed B. the level of activity of the cells within the tissue bed C. the amount of 0, within the venules D. All of the above are correct. E. None of the above is correct.

A decrease in blood pH and an increase in blood CO2 levels result ina. increased heart rate.b. increased stroke volume.c. increased sympathetic stimulation of the heart.d. increased cardiac output.e. All of these are correct

14. The injection of ______ could possibly save a baby’s life stricken with  Erythroblastosis fetalis. a. renin b. erythropoietin c. aldosterone d. angiotensin e. Histamine

1. Carbon dioxide released during respiration can affect the % oxygen saturation of haemoglobin. Carbon dioxide reacts with water to form carbonic acid. Which statements below explains the effect of carbon dioxide on haemoglobin? A. The release of hydrogen ions causes the pH to rise, which reduces haemoglobin's affinity for охуgen. B. The release of hydrogen ions causes the pH to rise, which increases haemoglobin's affinity for oxygen. C. The release of hydrogen ions causes the pH to fall, which increases haemoglobin's affinity for охygen. D. The release of hydrogen ions causes the pH to fall, which reduces haemoglobin's affinity for охуgen. E. None of the above can explain the change. 2. The following events occur when carbon dioxide enters an erythrocyte in a capillary. 1. Hydrogencarbonate ions diffuse into the plasma from the red blood cell 2. Dissociation of carbonic acid 3. Carbon dioxide reacts with water forming carbonic acid 4. Chloride ions diffuse into red blood cell from…