Negative Feedback (OCR GCSE Biology A, Combined (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is negative feedback?
What is negative feedback?
Body returns a factor to its original level
What does thyroxine regulate?
What does thyroxine regulate?
Metabolic rate
Which gland releases thyroxine?
Which gland releases thyroxine?
Thyroid gland
What stimulates the release of thyroxine?
What stimulates the release of thyroxine?
Thyroid stimulating hormone
Where are increased thyroxine levels detected?
Where are increased thyroxine levels detected?
Receptors in the brain
What happens when thyroxine levels increase?
What happens when thyroxine levels increase?
TSH release is inhibited
Which glands release adrenaline?
Which glands release adrenaline?
Adrenal glands
What triggers the release of adrenaline?
What triggers the release of adrenaline?
Fear or stress
What response does adrenaline stimulate?
What response does adrenaline stimulate?
'Fight or flight' response
How does adrenaline affect heart and breathing rate?
How does adrenaline affect heart and breathing rate?
Increases both rates
What happens to glycogen in the liver when adrenaline is released?
What happens to glycogen in the liver when adrenaline is released?
Converted to glucose
How does adrenaline affect the pupils?
How does adrenaline affect the pupils?
Pupils dilate