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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
 Describe the hormones secreted by ovaries.

Ovaries : The ovaries secrete the following hormones :

(1) Estrogen : It is secreted by graafian follicles. Estrogen performs the following functions :
a. It brings ovulation.
b. It brings development of genital ducts.

(2) Progesterone : It is secreted by corpus luteum. The progesterone help in the implantation. The progesterone also maintains the enlargement of uterine wall during pregnancy.

(3) Relaxin : It is secreted by corpus luteum (part of graafian follicle after ovulation) at the end of gestation period. It enlarges the pelvic region during the childbirth.

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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.
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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.
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Name the cells that the thyroid gland is composed of.

The thyroid gland is composed of the following :
i. Follicles
ii. Stromal tissue
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Name the endocrine gland which is H shaped.

Thyroid gland.
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Name the largest endocrine gland.

Thyroid gland.
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