Question

1)Define hormone.
2)Why are endocrine glands called ductless gland?
3) Where is thyroid gland located?
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Answer 1

4.What type of chemical reactions take place when electricity is passed through water?

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Answer 2

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1. Hormones are chemical substances that act like messenger molecules in the body.
2. The endocrine glands do not have ducts to carry their product to a surface. That's why they are called ductless glands.
3. Thyroid gland is located at the base of our neck, just below the Adam's apple.

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