Negative Feedback: Salt Concentration (Grade 12 NSC Matric Life Sciences): Flashcards
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Homeostasis definition
Homeostasis definition
Maintaining stable internal conditions despite external changes
Key hormone for salt regulation
Key hormone for salt regulation
Aldosterone
Gland that produces aldosterone
Gland that produces aldosterone
Adrenal gland
Main action of aldosterone
Main action of aldosterone
Increases sodium ion reabsorption from urine into blood
Cells that detect sodium level changes
Cells that detect sodium level changes
Receptor cells in the kidneys
Response to LOW blood sodium levels
Response to LOW blood sodium levels
Adrenal gland secretes more aldosterone
Response to HIGH blood sodium levels
Response to HIGH blood sodium levels
Adrenal gland stops releasing aldosterone
Effect of increased aldosterone on urine
Effect of increased aldosterone on urine
Less sodium lost in urine
Effect of decreased aldosterone on urine
Effect of decreased aldosterone on urine
More sodium excreted in urine
Type of system for salt regulation
Type of system for salt regulation
Negative feedback system