The hormone that constricts blood vessels is Angiotensin.
Understanding Angiotensin and Blood Vessel Constriction
Angiotensin plays a vital role in regulating blood pressure by narrowing (constricting) blood vessels. As a hormone, Angiotensin acts as a chemical messenger, coordinating bodily functions. It travels through the blood, delivering messages to organs, muscles, and other tissues. This constriction helps to increase blood pressure.
How Angiotensin Works
Angiotensin not only constricts blood vessels but also triggers the intake of water and salt (sodium). This dual action further contributes to the regulation of blood pressure.
Here's a breakdown:
- Blood Vessel Constriction: Angiotensin directly acts on blood vessels, causing them to narrow.
- Sodium and Water Retention: Angiotensin promotes the reabsorption of sodium and water in the kidneys, increasing blood volume.
Hormones and Body Function
Hormones, like Angiotensin, are crucial for coordinating various bodily functions. They act as messengers, traveling through the bloodstream to target specific cells and tissues.
| Hormone | Function |
|---|---|
| Angiotensin | Constricts blood vessels, regulates blood pressure, triggers sodium intake. |
| Insulin | Regulates blood sugar levels. |
| Adrenaline | Increases heart rate, blood pressure, and energy supply. |
| Melatonin | Regulates sleep-wake cycles. |
