Negative Feedback: Water Balance – Osmoregulation (Grade 12 NSC Matric Life Sciences): Flashcards
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Osmoregulation definition
Osmoregulation definition
Balancing water & salt levels in blood & tissue fluids
Full name of ADH
Full name of ADH
Antidiuretic hormone (also called vasopressin)
Gland that produces ADH
Gland that produces ADH
Pituitary gland
Location of osmoreceptors
Location of osmoreceptors
In the hypothalamus
Osmoreceptors' function
Osmoreceptors' function
Detect changes in water concentration in blood
Urine when dehydrated
Urine when dehydrated
Concentrated/darker urine
Urine when overhydrated
Urine when overhydrated
Dilute/lighter coloured urine
Negative feedback in osmoregulation
Negative feedback in osmoregulation
Response opposes the original change in water levels
ADH effect on kidneys (dehydration)
ADH effect on kidneys (dehydration)
Increases permeability; more water reabsorbed
ADH levels during overhydration
ADH levels during overhydration
Decreased/less ADH secreted