MCDB 111 Su 2017 Section quiz 4B 8/31/17 Mark the best answer to each question on your Scantron form. Make sure your name, perm, date, and MCDB 111 Summer quiz 4 appears on the answer form. Each correct answer is worth half a point. 1. Carbonic anhydrase catalyzes a. the formation of CO2 and H2O from H2CO3 b. the formation of H2CO3 from CO2 and H2O c. the formation of H2CO3 from lactic acid d. both a and b e. a, b, and c 2. Collapse of a lung may result from which of the following? a. Puncture of the parietal pleura (membrane separating the chest wall from the intrapleural space) b. Puncture of the visceral pleura (membrane separating the lungs from the intrapleural space) c. Chronic obstructive pulmonary disease (COPD) d. Respiratory distress syndrome e. both a and b 3. Primary hypertension could result from a. a mutation in a gene encoding a defective afferent stretch sensitive sensory neuron in the aorta b. a mutation in a gene encoding low density lipoprotein (LDL) receptors c. a mutation in a gene encoding insulin receptors d. a mutation in a gene encoding L type Ca2+ channels e. a mutation in a gene encoding ryanodine receptor linked Ca2+ channels 4. Which of these statements is true of the respiratory pump? a. It is a homeostatic mechanism for compensating for severe hypotension b. It is a homeostatic mechanism for balancing the O2/CO2 ratio c. It is a homeostatic mechanism for insuring an efficient return of venous blood to the heart d. It is a network of smooth muscle that facilitates the movement of air through the bronchioles e. It is a network of capillaries that moves blood through the lungs 5. Which of these would most benefit a person living near sea level who moves to a high altitude location? a. Enhanced production of 2, 3 diphosphoglycerate (DPG) in non-alveolar tissues b. Enhanced production of 2, 3 diphosphoglycerate (DPG) in alveolar tissues c. Decreased production of hemoglobin d. An increased ventilation rate e. A decreased ventilation rate 6. Which of these is true of the reabsorption of glucose in the kidney? a. It occurs through a primary active transport mechanism involving a glucose ATPase b. It occurs through countertransport with potassium c. It occurs through cotransport with sodium d. It occurs through passive transport e. It occurs primarily in the distal convoluted tubule7. Which of the following diseases/events would be most likely to result in an abnormally low arterial PO2 value? a. Sickle cell anemia b. Carbon monoxide poisoning c. Hemorrhage (sudden loss of blood) d. Chronic obstructive pulmonary disease (COPD) e. Hyperventilation 8. A substance has a plasma excretion rate of 50 mg/min. Its plasma concentration is 2 mg/ml. What is its plasma clearance rate? a. 100 ml/min b. 50 ml/min c. 25 ml/min d. 10 ml/min e. cannot be determined from this information 9. Given the following pressures within a renal corpuscle: glomerular capillary blood pressure (PGC) = 40 mm Hg, plasma protein osmotic force, (GC) = 25 mm Hg, and a fluid pressure in Bowman’s space = 15 mm Hg, what would be the net glomerular filtration pressure? a. 80 mm Hgb. mm Hg c. 40 mm Hg d. 25 mm Hg e. 0 mm Hg 10. Which of the following is true of the countercurrent multiplier system? a. It limits the tidal volume of the lungs so that lung collapse does not occur during expiration b. It utilizes an osmolality gradient in the loop of Henle to promote resorption of water by the body c. It requires both vasopressin and aldosterone to function d. It serves as one of the effector components of the baroreceptor blood pressure regulation system e. Both b and
View Full Document
Unlocking...