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Chemical Coordination and Integration

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
Briefly explain about pancreas.

Pancreas : The pancreas is a is a exocrine as well as endocrine gland. The pancreas has two types of cells :

(a) Pancreatic gland cells : These cells secrete enzymes.

(b) Islets of Langerhans : These are the endocrine part of the pancreas.  These cells are further of following types :

Briefly explain about pancreas.

Fig. A part of the section of pancreas to show an islent of Langerhans.

(i) Alfa cells : These secrete glucagon. The glucagon converts glycogen into glucose. This process is called glycogenolysis.

(ii) Beta cells : These secrete insulin. It converts glucose to glycogen in liver. This process is called glycogenesis.

(iii) Delta cells : These secrete somatostanin hormone which controls the rate of absorption of food.



Name the endocrine gland which is H shaped.

Thyroid gland.

Name the cells that the thyroid gland is composed of.

The thyroid gland is composed of the following :
i. Follicles
ii. Stromal tissue

Name the largest endocrine gland.

Thyroid gland.

What is goitre?

Goitre is the condition in the the thyroid gland is enlarged and the neck portion becomes swollen .It is due to the deficiency of iodine in our diet which results in the less production and secretion of the thyroid hormones that is hypothyroidism.

Why is the Parathyroid hormone called hypercalcemic hormone?

PTH or parathyroid hormone is also called hypercalcemic hormone as it increase the calcium level in the blood.