Biology GCSE
adrenaline
What adrenaline means in Biology GCSE, as defined for OCR.
Definition of adrenaline
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Reference: OCR
Secreted by the adrenal glands during stress or fear to trigger the fight-or-flight response, raising heart rate, dilating bronchioles, and diverting blood to muscles.
Topics that use adrenaline
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Using adrenaline in the exam
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