7.20B - **Higher and Biology Only** ADH and the Collecting Duct Flashcards
What is ADH?
ADH (antidiuretic hormone) is a hormone produced by and released from the pituitary gland in the brain.
Where does ADH travel after being released?
ADH travels from the brain to the kidney.
What effect does high water potential in the blood have on ADH release?
If water potential of the blood is too high, less ADH is released from the pituitary gland.
What happens to the collecting duct when less ADH is released?
The collecting duct becomes less permeable to water, leading to more water being released in urination.
What effect does low water potential in the blood have on ADH release?
If water potential of the blood is too low, more ADH is released from the pituitary gland.
What happens to the collecting duct when more ADH is released?
The collecting duct becomes more permeable to water, leading to less water remaining in the tubule and more entering blood vessels.
What is the overall effect of ADH on urination?
ADH prevents excessive urination by regulating water reabsorption in the kidneys.
What does ‘anti’ in antidiuretic mean?
‘Anti’ means the opposite of.
What does ‘diuretic’ refer to?
‘Diuretic’ is a substance that causes increased urination.
What does ADH stand for?
ADH stands for antidiuretic hormone, which means it prevents you from urinating.
