Protons influence the binding affinity of oxygen to hemoglobin. Based on the oxygen-transport mechanism of hemoglobin, which of the following is correct? A. The pH value of lung is lower than that of tissue B. Protons compete with oxygen C. Protons will facilitate oxygen release in lung D. Production of lactate during exercise will accelerate oxygen delivery.

The O2-binding curve for Hemoglobin (Hb) is sigmoidal because: a   O2 binding to Hb increases the binding affinity of Hb for additional O2. b   The pH of blood is near the pKa of histidine. c   The pH of the bloodstream changes with changes in O2 concentration. d   Hb’s O2-binding affinity changes with changes in pH.

factors that affect the unloading (releasing ) of oxygen more quickly from hemoglobin include all the following except a. increased pressure of CO2 b. elevated chlorine ions c. increased temp d. lowered pH

In anaerobic respiration, lactic acid is released into the blood from skeletal muscle. When oxygen is available, most of the lactic acid is converted back to pyruvic acid and glucose in the A. liver. B. skeletal muscle. C. Heart. D. lung.

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…

In mammals, the developing fetus obtains O₂ from its mother's blood via the placenta. For this to occur... A. The fetal hemoglobin must have a higher Pso than the maternal hemoglobin B. The O₂ equilibrium curve of the fetal hemoglobin must be left-shifted with respect to the curve for the maternal hemoglobin C. The maternal hemoglobin must have a higher O₂ binding affinity than the fetal hemoglobin D. The O₂ carrying capacity of the fetal hemoglobin must be greater than that of the maternal hemoglobin E. None of the above

The following factors affect the oxygen hemoglobin curve (unloading of O2) EXCEPT: a. Temperature. b. PH. c. Diphosphoglycerate. d. Tidal volume.

Use the image to answer the question.   The ability of oxygen to bind hemoglobin changes with altitude as shown. Which statement, if true, BEST explains this observation?   A. The partial pressure of atmospheric oxygen decreases with altitude.   B. The partial pressure of atmospheric oxygen increases with altitude.   C. The partial pressure of atmospheric carbon dioxide decreases with altitude.   D. The partial pressure of atmospheric carbon dioxide increases with altitude.

In regards to oxygen transport which of the following are true? A. 98.5% is transported in the blood bound to iron on the heme unit. B. 1.5% is transported in the blood bound to iron on the heme unit. C. 1.5% is transported in the blood bound to the white blood cells. D. 98.5% of transported in the blood bound to the white blood cells. Choose the correct answer

Write the mechanism for the transport of CO2 from cellular respiration sites to the lungs.Describe the process including where various steps take place.