HISTOLOGY
URINARY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Transfer of materials into tubular fluid
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Return of water and many solutes to the blood
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Either A or B
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None of the above
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Detailed explanation-1: -Tubular reabsorption is the process that moves solutes and water out of the filtrate and back into your bloodstream. This process is known as reabsorption, because this is the second time they have been absorbed; the first time being when they were absorbed into the bloodstream from the digestive tract after a meal.
Detailed explanation-2: -In renal physiology, reabsorption or tubular reabsorption is the process by which the nephron removes water and solutes from the tubular fluid (pre-urine) and returns them to the circulating blood.
Detailed explanation-3: -Water reabsorption is by osmosis through water channels in the membrane. These water channels consist of a family of proteins called aquaporin.
Detailed explanation-4: -The solutes and water move from the PCT to the interstitium and then into peritubular capillaries. The reabsorption in the proximal tubule is isosmotic. The proximal tubules reabsorb about 65% of water, sodium, potassium and chloride, 100% of glucose, 100% amino acids, and 85-90% of bicarbonate.