What are Hormones?

Do you know about Hormones?

Hormones are biologically active agents of ductless glands(called endocrine glands) released directly into blood circulation to act on sites.

Hormone are chemicals synthesized.Hormone are produced by the specialized glands to control and regulate the activity of certain cells and organs. The Famous name “Endocrine Gland.”

Hormones act in small amounts and have marked physiological effects.Their optimum connection is essential for normal functions of body.


signalling effects can be classified into the following:

  • Autocrine: The hormone act on the cell that discharge it.
  • Paracrine: The hormone act on a nearby cell without having to enter the blood circulation.
  • Intracrine: The hormone is produced in the cell and acts intracellularly means inside the cell.
  • Endocrine: The hormone act on the target cells once it is released from the respective glands into the bloodstream.

Classification of Hormone Of Human body

To regulate many functions, different types of hormones are produced in the body. They are classified as follows:

  1. Peptide Hormone
  2. Steroid Hormone
  3. Amine Hormone

In most cases, they require a latent period before before their effect is produced.In general the hormone secreted by the anterior pituitary called trophic hormone e.g.TSH stimulate the thyroid gland to release thyroid hormone.

The thyroid hormone in turn act on the pituitary gland to inhibit further release of TSH.

In general hormone are used as replacement if they are deficient in the body or otherwise to modify endocrine and metabolic abnormalities.

They are also used for non endocrinal disease taking advantage of their physiologic or pharmacologic effect.

Function Of Hormones

1. Metabolism.

2. Homeostasis (constant internal balance), as like blood pressure and blood sugar regulation, fluid  and electrolyte balance and body temperature.

3. Growth and development human body.

4. Sexual function.

5. Reproduction processes.

6. Sleep-wake cycle.

7. Mood.



Also read our other topics:

Vitamins and Antioxidants

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