Adrenaline
Adrenaline is a hormone released by the adrenal glands during fear, excitement, or emergency situations.
Practice This ConceptMain explanation
Teacher explanation
Adrenaline prepares the body for a quick response in danger. It increases heart rate, breathing rate, and blood flow to muscles so the body can act fast. This is often called the fight-or-flight response. It helps a person run, fight, or protect oneself during sudden stress.
Example
When a dog suddenly runs toward a child, adrenaline helps the child’s heart beat faster and muscles respond quickly.
Simple analogy
Adrenaline means emergency energy.
Common confusion
Students may think adrenaline is a nerve signal or a digestive chemical. It is a hormone, not a nerve impulse, and it works during stress.
Exam tip
In answers, link adrenaline with emergency response, faster heart rate, and extra energy for muscles.
Answer writing and exam use
1-mark use
Write the exact meaning of adrenaline in one clean line.
2-mark use
Define adrenaline and add one example or condition.
3-mark use
Explain adrenaline, show the method or example, and mention the common mistake.
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