Exam+2+--+Unknown+Year+--+Blank

Exam+2+--+Unknown+Year+--+Blank - ' 1. nr esponse a d...

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'1. In response to a decrease in blood pressure, the justaglomerular apparatus releases: (a) NaCl (b)angiotensin ll (c) anti-dururetic hormone (d) renin (e)B&D 2. The osmolarity of interstitial fluid is highest in the region of the kidney referred to as: (a) the collecting duct (b) the cortical nePhron (c) the inner medulla (d)the renal Pelvis (e) the glomerulus 3. The filtrate in Bowman's capsule consists of: (a) blood from the vasa recta (b) solutes and water from the afferent arteriole of the renal aftery (c) blood from the peritubular capillaries (d) solutes and water from the cortical nephron (e) none ofthe above 4. Bicarbonate is reabsorbed from the filtrate by: (a) passive reabsorption through the apical epithelial cell membrane (b) active transport of Na and glucose (c) increasing the net filtration pressure (d) the combined action of H+ and carbonic anhydrase (e) bicarbonate is not reabsorbed, it is secreted 5. Which of the following statements about anti-diuretic hormone (ADH) is NOT true? (a) ADH is produced in the hypothalamus. (b) ADH is released into the bloodstream when glucose levels are low. ici nOn is released into the bloodstream when the osmolarity of the blood rises above 300 mosm/liter. (d) ADH amplifies water reabsorption by the collecting duct (e) ADH release is inhibited by alcohol. 6. Which of the following statements about tight junctions is TRUF' (a) Tight junctions form a 'ziplock' seal around the bottom of an epithelial cell. (b) Tight junctions are permeable to water. (c) Tight junctions are formed by spot welds between cells. (d) Tight junctions are formed by connexins. (e) None ofthe above. 7. lf you are of age and have a beer tonight after the exam what effect will the alcohol in the beer have on the properties of the collecting duct? 8. The advantage of excreting wastes aS urea rather than as ammonia is that (A) urea can be exchanged for Na+' (B) urea is less toxic than ammonia. (C) urea requires more water for excretion than ammonia. (D) urea does not affect the osmolar gradient, (E) less nitrogen is removed from the body g. What is the name for the process through which materials are returned to the blood
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10. The transfer of fluid from the glomerulus to Bowman's capsule (A) results from active transport. (B) transfers large plasma proteins as easily as small molecules and salts. (C) is very selective as to which small molecules are transfered. (D) is mainly a consequence of blood pressure force-filtering the fluid. (E) usually includes the transfer of red brood cells to the nephron tubule. 11. At a particular position along a nephron, the osmotic potential of the filtrate is 500mosm/L while the sunounding kidney's is 600 mosm/l. Which one of
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Exam+2+--+Unknown+Year+--+Blank - ' 1. nr esponse a d...

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