PATHOLOGY MCQ
URINARY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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movement of molecules out of the tubule and into the peritubular blood.
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movement of molecules out of the peritubular blood and into the tubule for excretion
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movement of water and solutes from the plasma in the glomerulus, across the glomerular-capsular membrane, and into the capsular space of Bowman capsule.
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volume of plasma from which a substance is removed by the kidney per minute
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Detailed explanation-1: -afferent arteriole. Reabsorption, as performed in the kidney, may be defined as the: movement of molecules out of the tubule and into the peritubular blood.
Detailed explanation-2: -Tubular reabsorption is the movement of substances into the blood from the filtrate. A comparison of the volume of the filtrate formed per day (180 litres per day) with that of the urine released (1.5 litres), suggest that nearly 99 per cent of the filtrate has to be reabsorbed by the renal tubules.
Detailed explanation-3: -Reabsorption occurs primarily by passive transfer based on a concentration gradient, moving from a high concentration in the proximal tubule to the lower concentration in the capillaries surrounding the tubule (Figures 4-6). A factor that greatly affects reabsorption and urinary excretion is the pH of the urine.