URINARY SYSTEM AND MALE FEMALE REPRODUCTIVE SYSTEMS
URINARY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Urine is formed in a three-step process. Which of the following gives the correct order in which these steps take place in the nephron?
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tubular secretion, tubular reabsorption, glomerular filtration
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tubular reabsorption, tubular secretion, glomerular filtration
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glomerular filtration, tubular reabsorption, tubular secretion
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glomerular filtration, tubular secretion, tubular reabsorption
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Explanation:
Detailed explanation-1: -Urine formation takes place in three steps namely, glomerular filtration, selective reabsorption and tubular secretion. In the first step, blood containing nitrogenous wastes is filtered through a tuft of capillaries called glomerulus. This is followed by selective reabsorption of glucose, amino acids etc.
Detailed explanation-2: -Filtrate moves from Bowman’s capsule to the proximal tubule and into the loop of Henle, which dives into the renal medulla before returning to the renal cortex. From the loop of Henle, filtrate is transferred to the distal tubule and into the collecting duct, where it travels into the renal medulla for collection.
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