71. When ADH binds to receptor sites distal convoluted tubule cells, A. filtrate : 1380629

71. When ADH binds to receptor sites distal convoluted tubule cells, A. filtrate : 1380629.

 

71. When ADH binds to receptor sites on distal convoluted tubule cells, 
A. filtrate volume increases.
B. filtrate osmolality decreases.
C. potassium is secreted from the cells.
D. the distal convoluted tubule is less permeable to water.
E. the distal convoluted tubule is more permeable to water.

72. Urea is 
A. secreted into the filtrate by cells of the distal convoluted tubule.
B. diffuse out of the collecting ducts into the interstitial fluid of the medulla and then diffuse into the descending loop of Henle.
C. completely reabsorbed by the nephron.
D. actively transported into the filtrate by cells of the collecting duct.
E. None of these choices is correct.

73. Hydrogen ions are secreted into the filtrate by both the 
A. proximal and distal convoluted tubules.
B. collecting duct and Bowman’s capsule.
C. loop of Henle and the distal convoluted tubule.
D. proximal convoluted tubule and the loop of Henle.
E. loop of Henle only.

74. Which of the following are most likely to be actively secreted into the distal convoluted tubule? 
A. potassium ions.
B. chloride ions.
C. bicarbonate.
D. amino acids.
E. sodium.

75. Potassium ions enter the lumen of the _____ by the process of active transport. 
A. proximal convoluted tubule
B. renal corpuscle
C. loop of Henle
D. distal convoluted tubule
E. collecting duct

76.  In the sodium-hydrogen antiport system,  
A.  both sodium ions and hydrogen ions are transported into the tubular lumen.
B.  both sodium ions and hydrogen ions are transported into the tubular cell.
C.  sodium ions are transported into the cell; hydrogen ions are transported out of the cell.
D.  sodium ions are transported into the tubular lumen; hydrogen ions are transported into the cell.
E.  sodium ions are transported out of the cell; hydrogen ions are transported into the cell.

77. Tubular secretion occurs in which of the following structures? 
A. glomerulus
B. urethra
C. renal pelvis
D. distal convoluted tubule
E. collecting duct

78.  Tubular reabsorption and tubular secretion differ in that  
A.  tubular secretion is a passive process; tubular reabsorption uses active transport.
B.  tubular secretion adds materials to the filtrate; tubular reabsorption removes materials from the filtrate.
C.  tubular reabsorption increases urine volume; tubular secretion decreases urine volume.
D.  tubular reabsorption occurs in Bowman’s capsule; tubular secretion occurs in the peritubular capillary.
E.  tubular secretion moves materials from the filtrate into the blood; tubular reabsorption moves materials from the blood into the filtrate.

79.  Which of the following statements is true?  
A.  Most filtrate (99%) is eliminated as urine.
B.  Normal filtrate contains a large amount of protein.
C.  Reabsorption of water in the filtrate may be hormonally controlled.
D.  Sodium ions are secreted into the filtrate of the proximal convoluted tubule.
E.  Hormones play a minor role in fluid homeostasis.

80. The ability of the kidney to concentrate urine depends on 
A. proximal convoluted tubule reabsorption.
B. a high medullary concentration gradient.
C. osmosis.
D. rapid removal of filtrate.
E. a low medullary concentration gradient.

 

 

71. When ADH binds to receptor sites distal convoluted tubule cells, A. filtrate : 1380629

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