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Identify the wrong statement:
- a)Active secretion of H+ and K+ ions takes place in DCT.
- b)Glomerular filtrate is isotonic in comparison to blood plasma.
- c)Small amount of urea passes from collecting duct to medullary interstitium and enters the ascending limb of loop of Henle.
- d)Water reabsorption in PCT takes place with the help of vasopressin.
Correct answer is option 'D'. Can you explain this answer?
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Identify the wrong statement:a)Active secretion of H+ and K+ ions take...
Wrong Statement: Water reabsorption in PCT takes place with the help of vasopressin (option D).
Explanation:
Water reabsorption in the proximal convoluted tubule (PCT) occurs through a process called passive osmosis, not with the help of vasopressin.
Active secretion of H+ and K+ ions takes place in DCT:
The distal convoluted tubule (DCT) is responsible for the active secretion of hydrogen ions (H+) and potassium ions (K+) into the tubular fluid. This process helps in maintaining the acid-base balance and electrolyte levels in the body.
Glomerular filtrate is isotonic in comparison to blood plasma:
The glomerular filtrate is initially isotonic to blood plasma. It means that the concentration of solutes in the glomerular filtrate is similar to that of blood plasma. However, as the filtrate moves along the nephron and undergoes reabsorption, its composition changes.
Small amount of urea passes from collecting duct to medullary interstitium and enters the ascending limb of loop of Henle:
Urea is a waste product that is formed in the liver during protein metabolism. It is filtered by the glomerulus and then reabsorbed in small amounts in the proximal tubule. Some urea also passes from the collecting duct into the medullary interstitium and enters the ascending limb of the loop of Henle. This recycling of urea helps in the maintenance of the concentration gradient in the medullary interstitium, which is important for the reabsorption of water in the collecting duct.
Water reabsorption in PCT:
The majority of water reabsorption occurs in the proximal convoluted tubule (PCT). Around 65% of filtered water is reabsorbed in the PCT through a process called passive osmosis. This occurs due to the presence of water channels called aquaporins in the apical and basolateral membranes of the PCT cells. The reabsorption of water in the PCT is driven by the osmotic gradient created by the reabsorption of solutes, such as sodium, glucose, amino acids, and bicarbonate.
Vasopressin and water reabsorption:
Vasopressin, also known as antidiuretic hormone (ADH), plays a crucial role in regulating water reabsorption in the kidneys. It acts on the collecting ducts and the distal convoluted tubules to increase the permeability of their walls to water. This allows more water to be reabsorbed into the bloodstream, resulting in concentrated urine. However, vasopressin does not directly affect water reabsorption in the PCT.
Therefore, the correct answer is option D - Water reabsorption in PCT takes place with the help of vasopressin.
Explanation:
Water reabsorption in the proximal convoluted tubule (PCT) occurs through a process called passive osmosis, not with the help of vasopressin.
Active secretion of H+ and K+ ions takes place in DCT:
The distal convoluted tubule (DCT) is responsible for the active secretion of hydrogen ions (H+) and potassium ions (K+) into the tubular fluid. This process helps in maintaining the acid-base balance and electrolyte levels in the body.
Glomerular filtrate is isotonic in comparison to blood plasma:
The glomerular filtrate is initially isotonic to blood plasma. It means that the concentration of solutes in the glomerular filtrate is similar to that of blood plasma. However, as the filtrate moves along the nephron and undergoes reabsorption, its composition changes.
Small amount of urea passes from collecting duct to medullary interstitium and enters the ascending limb of loop of Henle:
Urea is a waste product that is formed in the liver during protein metabolism. It is filtered by the glomerulus and then reabsorbed in small amounts in the proximal tubule. Some urea also passes from the collecting duct into the medullary interstitium and enters the ascending limb of the loop of Henle. This recycling of urea helps in the maintenance of the concentration gradient in the medullary interstitium, which is important for the reabsorption of water in the collecting duct.
Water reabsorption in PCT:
The majority of water reabsorption occurs in the proximal convoluted tubule (PCT). Around 65% of filtered water is reabsorbed in the PCT through a process called passive osmosis. This occurs due to the presence of water channels called aquaporins in the apical and basolateral membranes of the PCT cells. The reabsorption of water in the PCT is driven by the osmotic gradient created by the reabsorption of solutes, such as sodium, glucose, amino acids, and bicarbonate.
Vasopressin and water reabsorption:
Vasopressin, also known as antidiuretic hormone (ADH), plays a crucial role in regulating water reabsorption in the kidneys. It acts on the collecting ducts and the distal convoluted tubules to increase the permeability of their walls to water. This allows more water to be reabsorbed into the bloodstream, resulting in concentrated urine. However, vasopressin does not directly affect water reabsorption in the PCT.
Therefore, the correct answer is option D - Water reabsorption in PCT takes place with the help of vasopressin.
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Identify the wrong statement:a)Active secretion of H+ and K+ ions take...
ADH or antidiuretic hormones are secreted from the neurohypophysis. This hormone makes the cells in the wall of collecting ducts permeable to water. Due to this, water moves from tubular fluid into tissue fluid, making the urine concentrated.
When there is any change in the osmolarity of our blood, ADH stimulates the reabsorption of water from the last part of DCT and the entire collecting duct by increasing the permeability of cells. Eventually, there is a decrease in the osmolarity of blood.
Once the osmolarity of blood comes to normal, the activity of osmoreceptor cells decreases leading to a decrease in ADH secretion. This is called negative feedback.
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Identify the wrong statement:a)Active secretion of H+ and K+ ions takes place in DCT.b)Glomerular filtrate is isotonic in comparison to blood plasma.c)Small amount of urea passes from collecting duct to medullary interstitium and enters the ascending limb of loop of Henle.d)Water reabsorption in PCT takes place with the help of vasopressin.Correct answer is option 'D'. Can you explain this answer?
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Identify the wrong statement:a)Active secretion of H+ and K+ ions takes place in DCT.b)Glomerular filtrate is isotonic in comparison to blood plasma.c)Small amount of urea passes from collecting duct to medullary interstitium and enters the ascending limb of loop of Henle.d)Water reabsorption in PCT takes place with the help of vasopressin.Correct answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Identify the wrong statement:a)Active secretion of H+ and K+ ions takes place in DCT.b)Glomerular filtrate is isotonic in comparison to blood plasma.c)Small amount of urea passes from collecting duct to medullary interstitium and enters the ascending limb of loop of Henle.d)Water reabsorption in PCT takes place with the help of vasopressin.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Identify the wrong statement:a)Active secretion of H+ and K+ ions takes place in DCT.b)Glomerular filtrate is isotonic in comparison to blood plasma.c)Small amount of urea passes from collecting duct to medullary interstitium and enters the ascending limb of loop of Henle.d)Water reabsorption in PCT takes place with the help of vasopressin.Correct answer is option 'D'. Can you explain this answer?.
Identify the wrong statement:a)Active secretion of H+ and K+ ions takes place in DCT.b)Glomerular filtrate is isotonic in comparison to blood plasma.c)Small amount of urea passes from collecting duct to medullary interstitium and enters the ascending limb of loop of Henle.d)Water reabsorption in PCT takes place with the help of vasopressin.Correct answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Identify the wrong statement:a)Active secretion of H+ and K+ ions takes place in DCT.b)Glomerular filtrate is isotonic in comparison to blood plasma.c)Small amount of urea passes from collecting duct to medullary interstitium and enters the ascending limb of loop of Henle.d)Water reabsorption in PCT takes place with the help of vasopressin.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Identify the wrong statement:a)Active secretion of H+ and K+ ions takes place in DCT.b)Glomerular filtrate is isotonic in comparison to blood plasma.c)Small amount of urea passes from collecting duct to medullary interstitium and enters the ascending limb of loop of Henle.d)Water reabsorption in PCT takes place with the help of vasopressin.Correct answer is option 'D'. Can you explain this answer?.
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