Question

1. Define the following (a) Exocrine gland (b) Endocrine gland (c) Hormone

Answer 1

Answer:

Explanation: a)Exocrine glands are glands that secrete substances onto an         epithelial surface by way of a duct

                       b)Endocrine glands are ductless glands of the endocrine system that secrete their products, hormones, directly into the blood.

                        c)A hormone is a chemical that is made by specialist cells, usually within an endocrine gland, and it is released into the bloodstream to send a message to another part of the body.

Answer 2

(a) Endocrine glands:-

These glands don't have ducts. They release their products at the target organs. Endocrine secretions are managed by chemical messengers known as hormones.

Eg:- pancreatic gland (mixocrine), adrenal gland

(b) Exocrine glands:-

These are glands which have ducts. The product of endocrine glands is known as enzyme.

Eg:- Salivary Glands

(c) Hormone:-

These are known as chemical messengers. Endocrine glands secrete hormones

Eg:- Adrenaline

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