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The Endocrine System - Coggle Diagram
The Endocrine System
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Thyroxine
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Excess Symptoms: Increased heart rate and blood pressure, weight loss, nervousness and trouble sleeping.
Negative Feedback Mechanism:
- The pituitary gland releases a hormone called TSH (Thyroid Stimulating Hormone)
- This causes the thyroid to release thyroxine.
- The build-up of thyroxine in the blood inhibits the production of further TSH by the pituitary.
- This stops the production of more thyroxine.
Hormone supplements
Insulin
The failure of the Islets of Langerhans in the pancreas to produce insulin leads to diabetes.
- Diabetics must take regular insulin supplements in the form of injections.
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The endocrine system: A group of glands that produce chemicals called hormones, many of which are proteins.
Hormones: Chemical messengers produced in endocrine glands and transported in the blood to a particular area where they have their effect.
Endocrine glands: Ductless
- their secretions diffuse directly into the blood.
Exocrine glands: Have ducts to carry their secretions, e.g. Salivary glands.