Answer to 15 Respiratory acidosis occurs during ____ because ____. a. Hypoventil

Question

Answer to 15

Respiratory acidosis occurs during ____ because ____. a. Hypoventilation; not enough carbon dioxide is brought in. b. Hypoventilation; too much carbon dioxide builds up. c. Hyperventilation; too much carbon dioxide Is removed. d. Hyperventilation; too much oxygen is brought in. e. Hypoventilation; not enough oxygen is brought in. Hemoglobin is designed to have a higher affinity for oxygen at the lungs and a lower affinity in the body tissues. What factors work together to decrease the affinity in the body tissues helping ensure that oxygen is delivered where it is needed most? (select all that apply) a. The lower P_O2 in body tissues b. Higher temperature of body tissues c. Lower P_CO2 of body tissues d. More acidic pH of body tissues e. The presence of carbonic anhydrase What are the gradients for gas exchange in the lungs? a. Oxygen 60mm Hg, carbon dioxide 6 mm Hg b. Oxygen 100 mm Hg, carbon dioxide 40 mm Hg c. Oxygen 40 mm Hg, carbon dioxide 46 mm Hg d. Oxygen lessthanorequalto 40 mm Hg carbon dioxide greaterthanorequalto 46 mm Hg e. Oxygen 160 mm Hg, carbon dioxide 0.3 mm Hg Which of the lines in figure 1 represents the lowest affinity of oxygen for hemoglobin?

Explanation / Answer

Answer 14: b (As explained below)

Increase in carbon dioxide in the blood will cause the pH to decrease and make the blood acidic. During hypoventilation carbon dioxide is exhaled below normal levels as most of it is retained in the pulmonary blood, thereby causing respiratory acidosis.

Answer 15: c (As explained below)

More the partial pressure of oxygen in the blood, more will be the affinity of oxygen. Reciprocally , lower the carbon dioxide partial pressures, more will be the affinity to oxygen. Also more the temperature, less will be the affinity and vice versa. Lower the carbon dioxide level more is the pH and more is the affinity. More presence of carbonic anhydrase means more carbon dioxide will be converted and the CO2 partial pressures there will be more.

Answer 16: b (As explained below)

Partial pressure of oxygen is maximum in the body in the lungs, at 100mm Hg. It is minimum in the veins at 40 mm Hg. In the tissues it is 60 mm Hg. In the atmosphere (outside the body) it is 100 mm Hg. Partial pressures below 40mm Hg are pathological.

Answer 17: c (As explained below)

Of the three curves shown, the curve c shows lowest values for hemoglobin saturation. Lower saturation indicates lower affinity.

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