61. If several small alveoli merge to form one single, larger air space, the res

Question

61. If several small alveoli merge to form one single, larger air space, the result would be a. Increase rate of gas exchange due to an increased volume of air within the alveolus b. Increased rate of gas exchange due to increased partial pressure of oxygen and decreased partial pressure of carbon dioxide within the alveolus Decreased rate of gas exchange due to an increase in the thickness of the respiratory membrane c. d. Decreased rate of gas exchange due to a decrease in surface area 62. If there were an obstruction in the renal artery, one might expect: A decrease in glomerular filtration rate (GFR) b. a. A decrease in the release of rennin An increase in the glomerular filtration rate (GFR) c. d. Both an increase in the glomerular filtration rate (GFR) and an increase in the release of rennin e. Both a decrease in the glomerular filtration rate (GFR) and an increase in the release of renin 63. The material that results from glomerular filtration contains a. Everything that is in blood b. Everything that is in blood, except blood cells and most proteins c. Water and electrolytes only d. Water and wastes only e. Only water 64. The structure that transports urine from the bladder to the outside of the body is the a. ureter b. nephror c. urethra d. peritubular offramp 65. In compensating for respiratory alkalosis, the body excretes more a. Ammonium ions b. Bicarbonate ions c. Dihydrogen phosphate ions d. Hydrogen ions 66. When the bicarbonate ion diffuses out of the red blood cells into plasma, it is usually exchanged with which anion? a. Sodium b. Potassium c. Phosphate d. Chloride

Explanation / Answer

61. d. Decreased rate of gas exchange due to a decrease in surface area.

The alveoli offer moist surface for easy gas exchange and due to large number of alveoli the surface area increases easing the process. But if these alveoli merge to form one, the total surface area will decrease resulting in decreased rate of gas exchange.

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