MYP 1 Biology · How Your Body Works · Updated

Hormones

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How do hormones actually control your body?

Ever wondered why you don't grow a beard at age 8, or why you suddenly feel a rush when you get startled? That's hormones at work behind the scenes. Your body uses these chemical messengers to send instructions from one place to another, but instead of using wires (like nerves), they send messages through your blood. When your glands release hormones, those molecules float around until they find cells with the right receptors,like sending a DM that only unlocks if the recipient has the right app installed.

Once a hormone docks with its target cell, it triggers a specific response. For example, insulin tells your cells to grab glucose from your blood, while adrenaline gets your heart pounding when you need to react fast. Hormones are the reason your body can coordinate big, slow changes,like growing taller, hitting puberty, or keeping your blood sugar steady,even when you're asleep or not paying attention.

Definition

When your body needs to send a message over long distances and keep things balanced for hours or days (like controlling your metabolism or water levels), it uses hormones,special chemicals released by glands that travel in your bloodstream to reach the right cells.

Analogy

Imagine your group chat: only people with the app and in the group actually get the message. Hormones work the same way,only cells with the matching receptor "see" the signal.

How do hormones actually control your body?
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