Question

Hormones are ........... substances secreted in ........... quantities by .......... which acts on the effector organs.

• A. Electrical, large, endocrine gland
• B. Chemical, small, endocrine gland
• C. Electrical, large, exocrine gland
• D. Chemical, small , exocrine gland

Answer 1

Answer: (B)

Chemical, small, endocrine gland

Hormones are organic chemical substances that are released or secreted by endocrine glands in one part of the body and sends out messages that affect cells in other parts of the body. They act as chemical messenger. The target organs or tissues are affected by and respond to only minute quantities of the hormones. Thus, only a small amount of hormone is required to alter cell metabolism. Major endocrine glands include pituitary, thyroid, parathyroids, pancreas, adrenals, testes or ovaries.

Thus, the correct answer is option B.