Role of Hormones in Osmoregulation (AQA A-Level Biology): 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?
Homeostatic control of water content
What two factors does the water potential of blood depend on?
What two factors does the water potential of blood depend on?
Solute concentration & water volume
Which of these causes water potential to decrease?
Which of these causes water potential to decrease?
Excessive sweating
Where are osmoreceptors located?
Where are osmoreceptors located?
Hypothalamus
What happens to osmoreceptors when water potential drops?
What happens to osmoreceptors when water potential drops?
They shrink as water leaves by osmosis
Where is ADH stored and released from?
Where is ADH stored and released from?
Posterior pituitary gland
Which enzyme is activated when ADH binds to kidney tubule cell receptors?
Which enzyme is activated when ADH binds to kidney tubule cell receptors?
Phosphorylase
What are aquaporins?
What are aquaporins?
Water channel proteins
What happens when water potential increases above normal?
What happens when water potential increases above normal?
Less ADH released, more dilute urine
What type of control does the osmoregulatory system demonstrate?
What type of control does the osmoregulatory system demonstrate?
Negative feedback