The Role of ADH (Leaving Cert Biology): Flashcards
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Osmoregulation definition
Osmoregulation definition
Controlling water & salt concentrations to maintain homeostasis
ADH alternative name
ADH alternative name
Vasopressin
Where ADH is stored
Where ADH is stored
Pituitary gland
ADH target organs in kidney
ADH target organs in kidney
Distal convoluted tubules & collecting ducts
ADH's main function
ADH's main function
Increases water reabsorption from kidney tubules
Meaning of 'anti-diuretic'
Meaning of 'anti-diuretic'
Works against excessive urine production
Where osmoreceptors are located
Where osmoreceptors are located
Hypothalamus
What triggers ADH release
What triggers ADH release
Blood plasma becomes too concentrated
Effect of ADH on tubule walls
Effect of ADH on tubule walls
Makes them more permeable to water
Urine when ADH levels are high
Urine when ADH levels are high
Low volume, concentrated
Urine when ADH levels are low/absent
Urine when ADH levels are low/absent
High volume, dilute
Type of feedback mechanism for ADH
Type of feedback mechanism for ADH
Negative feedback
Response when blood too concentrated
Response when blood too concentrated
Pituitary releases ADH
Response when blood too dilute
Response when blood too dilute
No ADH released