Hormones for NEET UG

Hormones are powerful chemical messengers that coordinate different activities inside the human body. They are produced in extremely small quantities but regulate essential processes such as growth, metabolism, reproduction, stress response and internal balance.

According to NCERT, hormones are non-nutrient chemicals produced in trace amounts that act as intercellular messengers. This definition is an important point for NEET UG examinations.

How Hormones Work

Hormones are secreted by endocrine glands into the surrounding tissue fluid. They enter the bloodstream and travel to different parts of the body. However, each hormone acts only on target cells containing its specific receptors.

The interaction between a hormone and its receptor produces a particular biological response.

Important Characteristics of Hormones

• They are non-nutrient chemicals
• They are produced in trace amounts
• They act as intercellular messengers
• They travel through blood or surrounding tissue fluid
• They act on specific target cells or organs
• Target cells contain hormone-specific receptors
• They regulate and coordinate body functions

Major Functions of Hormones

Hormones help regulate:

• Growth and development
• Metabolism and energy use
• Blood glucose levels
• Water and electrolyte balance
• Reproductive functions
• Stress responses
• Sleep and biological rhythms
• Maintenance of internal balance

Important NEET Point

Hormones are not structural proteins, digestive enzymes or metabolic waste products. They are chemical messengers that carry information between cells and coordinate physiological activities.

Watch the complete Zoology 01 lesson for the correct answer and a clear explanation of this NEET question.

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