Describe the process of urine formation
in human
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The most common method of filtering urine formation - re-surgical theory. According to this principle, in kidney particles, about 180 l per day is filtered for primary (provisional) urine, which is centered in nephron ducts. In this case, the epithelium of ducts reproduces a part of the elements from the urine in the blood. With the participation of enzymes and energy expenditure, and through reciprocally simple propagation, the re-correction process can be actively. In addition, epithelium of neophron ducts wrap some substances (drugs, acids, alkali).
The filtration is done through the complex structural construction of the capillary capillary wall. The fluid part of blood filtration flows through the gap between the small window endothelium, the basement membrane layer and pedikulami capillary podocytes in the lumen of the capsule. The most important in the filter is a basement membrane. Filing high and low blood colloid osmotic pressure takes place rapidly. Pressure in the capillary capillaries - 9,3-10,7 kg of Pascal (70-80 mmHg.), And the colloid-osmotic pressure of plasma proteins - 3,3-4,0 kg Pascal (20-30 mmHg ..). Reduction of pressure in the inferior lipid capillaries below 6.7 kg Pascal with filtration procedures. The pressure in the capillary capillaries is regulated by the lack of lead and efferent arteriole.
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The most common method of filtering urine formation - re-surgical theory. According to this principle, in kidney particles, about 180 l per day is filtered for primary (provisional) urine, which is centered in nephron ducts. In this case, the epithelium of ducts reproduces a part of the elements from the urine in the blood. With the participation of enzymes and energy expenditure, and through reciprocally simple propagation, the re-correction process can be actively. In addition, epithelium of neophron ducts wrap some substances (drugs, acids, alkali).
The filtration is done through the complex structural construction of the capillary capillary wall. The fluid part of blood filtration flows through the gap between the small window endothelium, the basement membrane layer and pedikulami capillary podocytes in the lumen of the capsule. The most important in the filter is a basement membrane. Filing high and low blood colloid osmotic pressure takes place rapidly. Pressure in the capillary capillaries - 9,3-10,7 kg of Pascal (70-80 mmHg.), And the colloid-osmotic pressure of plasma proteins - 3,3-4,0 kg Pascal (20-30 mmHg ..). Reduction of pressure in the inferior lipid capillaries below 6.7 kg Pascal with filtration procedures. The pressure in the capillary capillaries is regulated by the lack of lead and efferent arteriole.
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Answer:
The urine formation involves three steps -
(i) Glomerular filtration - Nitrogenous wastes, Glucose water, amino acid filter from the blood into Bowman capsule of nephron.
(ii) Tubular reabsorption - Now, useful substances from the filtrate are reabsorbed back by capillaries surrounding the nephron.
(iii) Secretion - Urea, extra water and salts are secreted into the tubule which open up into the collecting ducts and then into the ureter.
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