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What substances are selectively re-absorbed from the initial filtrate in the kidneys?
- a)Waste products
- b)Glucose, amino acids, salts
- c)Urea, uric acid
- d)Water
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
What substances are selectively re-absorbed from the initial filtrate ...
- During the process of urine formation in the kidneys, the initial filtrate from the blood (which includes water, ions, glucose, amino acids, urea, and other substances) passes through the renal tubules.
- As this filtrate moves along the tubules, various substances are selectively reabsorbed back into the bloodstream to maintain the body's balance of water and solutes.
Community Answer
What substances are selectively re-absorbed from the initial filtrate ...
Re-absorption of Substances in the Kidneys
Re-absorption refers to the process by which certain substances are taken back into the bloodstream from the initial filtrate that is produced in the kidneys.
Key Substances that are Selectively Re-absorbed:
- Glucose: Glucose is an essential energy source for the body, and it is re-absorbed in the kidneys to prevent its loss in the urine.
- Amino Acids: Amino acids are the building blocks of proteins, and re-absorption ensures that they are not excreted unnecessarily.
- Salts: Various salts like sodium and potassium are re-absorbed to maintain the body's electrolyte balance.
Explanation:
The initial filtrate produced in the kidneys contains a mixture of waste products, along with essential substances like glucose, amino acids, and salts. To prevent the loss of these important molecules, they are selectively re-absorbed back into the bloodstream as the filtrate passes through the nephron.
Importance of Selective Re-absorption:
- Maintains body's nutrient levels: Re-absorption of glucose and amino acids ensures that the body's essential nutrients are not wasted.
- Regulates electrolyte balance: Re-absorption of salts helps in maintaining the proper balance of electrolytes in the body.
- Prevents dehydration: Re-absorption of water in the kidneys helps in maintaining the body's fluid balance and prevents dehydration.
In conclusion, selective re-absorption in the kidneys plays a crucial role in maintaining the body's overall health by ensuring that essential substances are retained while waste products are excreted.
Re-absorption refers to the process by which certain substances are taken back into the bloodstream from the initial filtrate that is produced in the kidneys.
Key Substances that are Selectively Re-absorbed:
- Glucose: Glucose is an essential energy source for the body, and it is re-absorbed in the kidneys to prevent its loss in the urine.
- Amino Acids: Amino acids are the building blocks of proteins, and re-absorption ensures that they are not excreted unnecessarily.
- Salts: Various salts like sodium and potassium are re-absorbed to maintain the body's electrolyte balance.
Explanation:
The initial filtrate produced in the kidneys contains a mixture of waste products, along with essential substances like glucose, amino acids, and salts. To prevent the loss of these important molecules, they are selectively re-absorbed back into the bloodstream as the filtrate passes through the nephron.
Importance of Selective Re-absorption:
- Maintains body's nutrient levels: Re-absorption of glucose and amino acids ensures that the body's essential nutrients are not wasted.
- Regulates electrolyte balance: Re-absorption of salts helps in maintaining the proper balance of electrolytes in the body.
- Prevents dehydration: Re-absorption of water in the kidneys helps in maintaining the body's fluid balance and prevents dehydration.
In conclusion, selective re-absorption in the kidneys plays a crucial role in maintaining the body's overall health by ensuring that essential substances are retained while waste products are excreted.
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What substances are selectively re-absorbed from the initial filtrate in the kidneys?a)Waste productsb)Glucose, amino acids, saltsc)Urea, uric acidd)WaterCorrect answer is option 'B'. Can you explain this answer?
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