Feedback Mechanisms (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
How many essential components are involved in homeostatic control systems?
How many essential components are involved in homeostatic control systems?
Five
What is the role of a receptor in homeostatic control?
What is the role of a receptor in homeostatic control?
Detects deviation from set point
Which component processes information from receptors and determines the appropriate response?
Which component processes information from receptors and determines the appropriate response?
Coordinator
What happens in negative feedback once the system returns to its optimum level?
What happens in negative feedback once the system returns to its optimum level?
Corrective measures are switched off
Which cells in the pancreas detect low blood glucose and secrete glucagon?
Which cells in the pancreas detect low blood glucose and secrete glucagon?
α cells
What does insulin promote when blood glucose levels rise?
What does insulin promote when blood glucose levels rise?
Glucose uptake and storage
Where are the thermoreceptors that detect blood temperature changes located?
Where are the thermoreceptors that detect blood temperature changes located?
In the hypothalamus
Which response occurs when body temperature increases above normal?
Which response occurs when body temperature increases above normal?
Vasodilation
How does positive feedback affect deviations from normal levels?
How does positive feedback affect deviations from normal levels?
Amplifies them
What does oxytocin cause during childbirth that demonstrates positive feedback?
What does oxytocin cause during childbirth that demonstrates positive feedback?
Uterine contractions