Negative Feedback: Water Balance – Osmoregulation (Grade 12 NSC Matric Life Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is osmoregulation?
What is osmoregulation?
Balancing water & salt in blood & tissues
Which gland produces ADH?
Which gland produces ADH?
Pituitary gland
Where are osmoreceptors located?
Where are osmoreceptors located?
Hypothalamus
What happens to urine during dehydration?
What happens to urine during dehydration?
Becomes more concentrated (darker)
What does ADH do to kidney collecting ducts?
What does ADH do to kidney collecting ducts?
Increases their permeability
What happens to ADH levels during overhydration?
What happens to ADH levels during overhydration?
ADH secretion decreases or stops
What characterises negative feedback in osmoregulation?
What characterises negative feedback in osmoregulation?
Response opposes the original change
How sensitive are osmoreceptors to blood concentration changes?
How sensitive are osmoreceptors to blood concentration changes?
Can detect 1-2% changes
What is the main function of sodium ions?
What is the main function of sodium ions?
Nerve function & muscle contraction
Which kidney structures does ADH affect?
Which kidney structures does ADH affect?
Collecting ducts & distal tubules