GENERAL ANATOMY
URINARY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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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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Detailed explanation-1: -Hence the correct order is ‘Glomerular filtration → Reabsorption → Secretion’.
Detailed explanation-2: -Urine is formed in three main steps-glomerular filtration, reabsorption and secretion. It comprises 95 % water and 5% wastes such as ions of sodium, potassium and calcium, and nitrogenous wastes such as creatinine, urea and ammonia.
Detailed explanation-3: -extra info: The correct order for filtrate flow through a nephron is Glomerular capsule, PCT, loop of Henle, DCT, collecting duct. Filtrate is formed as plasma filters into the glomerular capsule.
Detailed explanation-4: -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.