Question

Define the following:

(a) Exocrine gland
(b) Endocrine gland
(c) Hormone

Answer 1

Answer:

(a) Exocrine glands:

Glands that discharge secretions into ducts are known as exocrine glands. Sebaceous gland in the skin, salivary gland in the buccal cavity, etc. are examples of exocrine glands.

(b) Endocrine glands:

Glands that do not discharge their secretions into ducts are known as endocrine glands. Instead, these glands discharge their secretions directly into the blood. Pituitary gland, thyroid gland, adrenal gland, etc. are examples of endocrine glands.

(c) Hormones:

Hormones are chemical messengers that regulate physiological processes in living organisms. They act upon specific cells/tissues/organs which are called target cells/tissues/organs.

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Answer 2

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(a) exocrine glands are glands produce substances and secrete them in the epithelial of the way of duct.

Eg:- mammary glands, salivary glands .

(b) endocrine glands are glands that produce substances which are secreted into the blood .

Eg:-pituitary gland ,etc.

(c) hormones are substances produced by endocrine glands .