Secretory glands, the thyroid gland

In this topic

• What is a gland? The three kinds
• Hormones and their properties
• The thyroid gland: structure and hormones
• Too little or too much hormone. Iodine and prevention

Key terms

• Gland
• Exocrine gland
• Endocrine gland
• Mixed gland
• Hormone
• Target organ
• Receptor
• Thyroid gland
• Follicle
• Thyroxine (T4)
• Iodine
• Endemic goitre

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