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What acts on the distal convoluted tubules and collecting ducts?
The distal convoluted tubules and collecting ducts are primarily influenced by hormones such as aldosterone and antidiuretic hormone (ADH). Aldosterone promotes sodium reabsorption and potassium excretion, while ADH increases water reabsorption by making the collecting ducts more permeable to water. Together, these hormones play crucial roles in regulating electrolyte balance and fluid homeostasis in the body.
What do the walls of the collecting ducts have variable permeability to?
The walls of the collecting ducts have variable permeability to water and urea. This allows the kidneys to adjust the concentration of urine depending on the body's hydration levels.
What collecting ducts converge as they extend toward the calyces forming the renal?
The collecting ducts that converge as they extend toward the calyces are primarily the ducts of Bellini, which are the terminal segments of the collecting system in the kidney. These ducts collect urine from multiple nephrons and transport it into the renal pelvis, where it then moves to the ureter. The convergence of these ducts plays a crucial role in concentrating urine and regulating water balance in the body.
Which substance directly controls the reabsorption of water from the collecting ducts?
Antidiuretic hormone (ADH), also known as vasopressin, directly controls the reabsorption of water from the collecting ducts in the kidneys. ADH acts on the aquaporin water channels in the collecting duct cells to increase water reabsorption back into the bloodstream, helping to concentrate the urine and conserve water.
Which region of the nephron does ADH affect water reabsorption?
Antidiuretic hormone (ADH) primarily affects water reabsorption in the collecting ducts of the nephron. It increases the permeability of the collecting ducts to water by promoting the insertion of aquaporin-2 channels in the membranes of the cells lining the ducts. This allows more water to be reabsorbed back into the bloodstream, thereby concentrating the urine and reducing water loss.
What acts on the distal convoluted tubules and collecting ducts?
The distal convoluted tubules and collecting ducts are primarily influenced by hormones such as aldosterone and antidiuretic hormone (ADH). Aldosterone promotes sodium reabsorption and potassium excretion, while ADH increases water reabsorption by making the collecting ducts more permeable to water. Together, these hormones play crucial roles in regulating electrolyte balance and fluid homeostasis in the body.
What substance directly controls the reabsorption of water from the collecting ducts?
The antidiuretic hormone is the substance that directly controls the reabsorption of water from the collecting ducts. It is also known as vasopressin.
Does diuretics work on the collecting ducts?
Diuretics work in the region of the collecting ducts, but on the ducts themselves. They inhibit ADH from causing water to be reabsorbed in the distal tubules and that produces more urine output.
What is the roleof anti-diuretichormone (ADH)in the body?
ADH makes the collecting duct & distal convoluted tubule of the nephron more permeable to water
What is the role of anti diuretichormone (ADH) in the body?
ADH makes the collecting duct & distal convoluted tubule of the nephron more permeable to water
What is the role of anti-diuretic hormone (ADH) in the body?
ADH makes the collecting duct & distal convoluted tubule of the nephron more permeable to water
What do the walls of the collecting ducts have variable permeability to?
The walls of the collecting ducts have variable permeability to water and urea. This allows the kidneys to adjust the concentration of urine depending on the body's hydration levels.
The site at which ADH is most active?
ADH (antidiuretic hormone) is most active in the kidneys, where it acts to increase water reabsorption in the collecting ducts. This helps to concentrate urine and regulate body water balance.
Which substance directly controls the reabsorption of water from the collecting ducts?
Antidiuretic hormone (ADH), also known as vasopressin, directly controls the reabsorption of water from the collecting ducts in the kidneys. ADH acts on the aquaporin water channels in the collecting duct cells to increase water reabsorption back into the bloodstream, helping to concentrate the urine and conserve water.
Which region of the nephron does ADH affect water reabsorption?
Antidiuretic hormone (ADH) primarily affects water reabsorption in the collecting ducts of the nephron. It increases the permeability of the collecting ducts to water by promoting the insertion of aquaporin-2 channels in the membranes of the cells lining the ducts. This allows more water to be reabsorbed back into the bloodstream, thereby concentrating the urine and reducing water loss.
Is the distal tubule and collecting ducts relatively impermeable due to water in the absence of hormones?
No, the distal tubule and collecting ducts are not impermeable to water in the absence of hormones. These segments of the nephron regulate water reabsorption based on hormonal signals, particularly antidiuretic hormone (ADH). When ADH is present, water channels called aquaporins are inserted into the tubule walls, allowing for increased water reabsorption.
Which hormone is responsible for facultative water reabsorption in the collecting ducts?
ADH is the hormone responsible for facultative water reabsorption.
