Question

Which of the following statements is not correct for the hormones?
A) They act on target organs away from the source glands.
B) They are secreted directly into the blood.
C) They are used again and again like catalysts.
D) They are produced in very minute quantities and are biologically very active.

Answer 1

Hint: Hormones are secreted by a specific type of glands. These glands are also called the Endocrine glands. These secrete hormones which act on organs for stimulation of particular activity.

Complete Step by Step Answer:
Hormones are secreted by endocrine glands which are transported via blood to the target organ located away from the source. Thus, hormones are called chemical messengers and such glands are called ductless glands.

For instance, Follicle stimulating hormone secreted by gonadotropin hormone acts on sex organs for nourishment of sperms and growth of follicle in males and females respectively; and other areas for development of secondary sexual characters like formation of mammary glands, growth of beard and hair on pubic region.

Unlike catalysts, hormones, if used once, cannot be reused. Catalysts These are either destroyed by the liver or the cells of the target organ. Their remnants then are excreted out via kidney.

These chemical messengers are secreted in very small amounts. Such small amounts can drive the functions of our body. Thus, even a small increase or decrease in their amount will prove to be dangerous for an individual.

Thus, the correct answer is C:They are used again and again like catalysts.

Note: Endocrine system is under involuntary control. Their effects can last both long-term and short-term. Overall, it functions to maintain homeostasis in all metabolic reactions,promote growth and development of the body.