adrenaline
CEFR: B2
A sympathetic hormone and neurotransmitter secreted by the adrenal medulla during the fight-or-flight response.
Synonyms
- epinephrine
- fight-or-flight hormone
Common Collocations
- adrenaline surge
- adrenaline rush
- release of adrenaline
Example Sentence
An acute surge of adrenaline elevates cardiac output, dilates bronchioles, and diverts blood to skeletal muscles.