Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909



Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909
Textbook Problem

Which of the following empties urine into the bladder?

A. Collecting ducts B. Ureters

C. Distal convoluted D. Urethra


Summary Introduction


The two bean-shaped organs, the kidneys, are present at the abdominal cavity’s posterior wall on the side of the vertebral column. The functional unit of kidneys is referred to as nephron. Nephron consists of glomerulus, loop of Henle, proximal tubule and distal tubule. Urine formation, tubular reabsorption, and secretion occur in the nephrons.


Explanation/justification for the correct answer:

Option (b) is, ‘ureters.’ Urine formation begins with the filtration of fluid in glomerulus into Bowman’s capsule. The filtered fluid goes into the proximal convoluted tubule (PCT), then into the descending limb, to the loop of Henle, further to the ascending limb, which then goes to the distal convoluted tubule that empties into the collecting ducts. These drain into the renal pyramid which goes to the renal pelvis. From the renal pelvis, the urine passes into the ureters. Ureters pass the urine into the bladder. So, option (b) is correct.

Explanation for incorrect answer:

Option (a) is, ‘collecting ducts...

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