hormone

Everyday

1. A hormone is a chemical messenger made in the body that travels in the blood and tells parts of the body what to do. tree →
2. Plants also have hormones that control how they grow. tree →

In the lessons

In science lessons hormones control growing, puberty, sleep, hunger and how we react to fear — adrenaline is the hormone that makes your heart race when scared. Insulin controls sugar in the blood. In growing-up lessons, puberty is caused by hormones, which can also change moods. In plants, hormones make roots grow down and shoots grow towards light. Phrases: «growth hormone», «stress hormone», «hormone changes».

Examples

• Hormones travel around the body in the blood. tree →
• Adrenaline is a hormone that gets you ready to run. tree →
• Growth hormone helps children grow taller. tree →
• Puberty starts when the body makes new hormones. tree →
• Insulin is a hormone that controls blood sugar. tree →
• Hormones can make your moods change. tree →
• Plant hormones make shoots grow towards light. tree →
• Melatonin is a hormone that helps you sleep. tree →

Note

Countable: hormones. Adjective: hormonal. Stress: HOR-mone. Hormones are not germs or medicine; the body makes them itself, though some medicines replace missing hormones.