British Sign Language Glossaries of Curriculum Terms

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BSL Environmental Science Glossary - Adrenaline definition


Definition: Adrenaline is a hormone and part of the endocrine system. It’s produced in the adrenal gland, specifically in the medulla. Adrenaline helps the body respond to danger, threat, fear and stress. When adrenaline is released into the bloodstream, the body responds by making the heart beat more rapidly; blood pressure surges, blood sugar rises, and we become more alert - the hairs on our skin also stand up. Adrenaline causes blood vessels to expand, allowing more oxygen and glucose to be delivered to the muscles so that the body can react more urgently to fear and be ready to fight or flight.