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Out of the following excretory materials, the ones which are not reabsorbed include
Option: 1
Glucose and amino acid
Option: 2
Sulphates and creatinine
Option: 3
Chlorides and phosphates
Option: 4
Sodium and potassium
Answers (1)
Urine Formation: Tubular Reabsorption in PCT -
- 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 percent of the filtrate has to be reabsorbed by the renal tubules.
- This process is called reabsorption.
- This process involves both passive and active transport across the tubular epithelium.
Tubular Reabsorption in PCT:
- About 65% of the reabsorption occurs in the PCT.
- Glucose, amino acids, vitamins, hormones, sodium, potassium, chlorides, phosphates, bicarbonates, much of water and urea from the filtrate are absorbed.
- Sulphates and creatinine are not reabsorbed.
- Sodium and potassium are reabsorbed by the primary active transport.
- Glucose and amino acids are reabsorbed by the secondary active transport.
- Water is reabsorbed by osmosis.
-
Sulphates and creatinine are not reabsorbed.Hence, the correct option is b. sulphates and creatinine
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