Question: The part of nephron” least permeable to water” is______________?

• 1. Proximal tubule
• 2. Descending limb of loop of Henle
• 3. Ascending limb of loop of Henle
• 4. Collecting tubule

Question: In which segment of the nephron does tubular fluid has the highest osmolarity ?

• 1. Henle’s loop
• 2. Distal tubule
• 3. Proximal tubule
• 4. Collecting duct

Question: Site of ADH action is______________?

• 1. Proximal tubule
• 2. Loop of Henle
• 3. Vasa recta
• 4. Collecting tubule

Question: Diuresis is caused by______________?

• 1. Mannitol
• 2. Glycerol
• 3. Urea
• 4. All of the above

Question: Macula dense in kidney is located in relation to______________?

• 1. PCT
• 2. DCT
• 3. Afferent arteriole
• 4. Efferent arteriole

Question: Which of the following is important in renal excretion of hydrogen ion ?

• 1. Combining H+ with Cl- to form Hcl
• 2. Combining H+ and HCO3- via enzyme carbonic anhydrase
• 3. Trapping H+ by acetate
• 4. Trapping H+ by NH3+

Question: The renal clearance of _______________?

• 1. Creatinine indicates glomerular filtration rate
• 2. Inulin is lower than that of urea
• 3. Chloride increases after in injection of aldosterone
• 4. PAH continues to rise as the plasma concentration of PAH increases

Question: True about nephron is_____________?

• 1. Na is absorbed actively in descending loop of Henle
• 2. 60 to 70% of GFR is absorbed in proximal tubule
• 3. Absorption of water occurs in ascending loop of Henle
• 4. The filtrate reaching distal convoluted tubule is hypertonic with respect to surroundings

Question: The hyperosmolarity of the renal medulla is due to increased content of_____________?

• 1. K+
• 2. Na+
• 3. Glucose
• 4. NH4+

Question: Renin secretion is stimulated by all except_____________?

• 1. Cardiac failure
• 2. Low Na+ in proximal tubule
• 3. Sympathetic stimulation
• 4. High Na+ in proximal tubule