GENERAL ANATOMY
URINARY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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From capillary blood to tubular blood
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From proximal convoluted tubule to glomerulus
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From proximal convoluted tubule to distal convoluted tubule
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From tubular fluid to capillary blood
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Detailed explanation-1: -Tubular secretion is the transfer of materials from peritubular capillaries to the renal tubular lumen; it is the opposite process of reabsorption. This secretion is caused mainly by active transport and passive diffusion. Usually only a few substances are secreted, and are typically waste products.
Detailed explanation-2: -Tubular reabsorption is the movement of substances into the blood from the filtrate.
Detailed explanation-3: -Location of Tubular Secretion The secreted substances come from the blood in peritubular capillaries and pass through the interstitial fluid before going through the wall of the tubule (known as the transport epithelium) into the inside of the tubule (known as the lumen).
Detailed explanation-4: -Hydrogen, creatinine, and drugs are removed from the blood and into the collecting duct through the peritubular capillary network.
Detailed explanation-5: -Secretion in the Proximal Convoluted Tubule This tubule secretes a range of organic ions, including hydrogen ions and ammonium ions. Ammonium ions are a poisonous waste product of deamination (the process that removes an amino group from an amino acid). Urea is also secreted in this tubule.