Osmoregulation (neg. feedback) (Edexcel GCSE Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is osmoregulation?
What is osmoregulation?
Control of water & mineral ion balance
What happens to cells if water concentration in the blood is too high?
What happens to cells if water concentration in the blood is too high?
Water moves in cells; cells can burst
What happens to cells if water concentration in the blood is too low?
What happens to cells if water concentration in the blood is too low?
Water moves out of cells; cells shrink
What does negative feedback do in control systems?
What does negative feedback do in control systems?
Reverses changes to maintain steady state
Where are the osmoreceptors that detect blood concentration located?
Where are the osmoreceptors that detect blood concentration located?
Hypothalamus
Which hormone is released when the body is dehydrated?
Which hormone is released when the body is dehydrated?
Anti-Diuretic Hormone (ADH)
What does ADH do to the collecting ducts in the kidneys?
What does ADH do to the collecting ducts in the kidneys?
Makes them more permeable to water
What happens to urine when the body is dehydrated?
What happens to urine when the body is dehydrated?
More concentrated & smaller volume
What happens to ADH release when the body is overhydrated?
What happens to ADH release when the body is overhydrated?
ADH release is reduced
What happens to urine when the body is overhydrated?
What happens to urine when the body is overhydrated?
Larger volumes of dilute urine produced
Which part of the nephron does ADH specifically target?
Which part of the nephron does ADH specifically target?
Collecting ducts
Which gland releases ADH into the bloodstream?
Which gland releases ADH into the bloodstream?
Pituitary gland