Revision Notes For For Class 11 Biology Chapter 22 Chemical Coordination And Integration

The different types of cellular functions n the human body are controlled and regulated by the specialized glands of the endocrine system.

CBSE Notes Class 11 Biology Chapter 22 Chemical Coordination and Integration

These glands are secretory organs which are divided into two main types:

Exocrine glands: They are the glands which function by producing and secreting substances onto an epithelial surface with the help of the ducts. Sweat, salivary, mammary, lacrimal, sebaceous, and mucus are the glands of the exocrine system.

Endocrine glands: They are the ductless glands endocrine system, which functions by secreting hormones, directly into the bloodstream. The glands of the endocrine system include:

  • Adrenal Glands,
  • Hypothalamus,
  • Ovaries,
  • Pancreas,
  • Parathyroid Gland,
  • Pineal Gland,
  • Pituitary Gland,
  • Testes,
  • Thyroid Gland.

Hormones are the chemical substances produced from endocrine glands. They travel through the bloodstream to tissues and organs and function by regulating the organs and other physiological processes in the living organism.

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Frequently asked Questions on CBSE Class 11 Biology Notes Chapter 22: Chemical Coordination and Integration

What is the importance of the ‘Thyroid gland’?

The thyroid gland is a vital hormone gland: It plays a major role in the metabolism, growth and development of the human body.

What are ‘Gonads’ and what are their functions?

The gonads, the primary reproductive organs, are the testes in the male and the ovaries in the female. These organs are responsible for producing the sperm and ova, but they also secrete hormones and are considered to be endocrine glands.

What are the 2 main female hormones?

The two main female sex hormones are estrogen and progesterone. Although testosterone is considered a male hormone, females also produce and need a small amount of this also.

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