Chemical Control

Our body uses chemical substances called hormones to regulate and coordinate various activities. Hormones are produced by special organs called endocrine glands, which are also known as ductless glands because they lack storage or transport systems for their secretions. As soon as hormones are produced, they are directly released into the bloodstream, allowing them to travel to all parts of the body.

Endocrine glands

The endocrine glands work along with the nervous system to manage the body’s control and coordination. While the nervous system transmits fast and short-lived signals through electrical impulses, hormones act much more slowly but produce long-lasting effects. This makes the endocrine system essential for processes that require sustained regulation, such as growth, metabolism, and reproduction.

Examples of Hormonal Action,

To ensure that hormones are effective, they are secreted only when needed and in the right amounts. There is a built-in mechanism in the body that regulates hormone production. For example:

• When blood sugar levels rise after eating, certain cells in the pancreas are stimulated.
• In response, these cells release a hormone called insulin into the blood.
• Insulin helps lower blood sugar levels by facilitating the absorption of glucose into cells.

This mechanism ensures that the body maintains balance and functions efficiently. Comparison Between Nervous System and Endocrine System:

1. Speed: Nerve impulses act quickly, while hormones work more slowly.
2. Duration: Effects of nerve impulses are short-lived, but hormonal effects last longer.
3. Mode of Action: The nervous system uses electrical signals, whereas hormones are chemical messengers carried by the blood.