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Question

Estrogen is secreted by

A
Ovary
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B
Membrana granulosa of Graafian follicle
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C
Germinal epithelium of ovary
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D
Pituitary
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Solution

The correct option is B Membrana granulosa of Graafian follicle
A cross section of ovary reveals a cortex and a vesicular medulla. The cortex contains round epithelial vesicle or follicles; follicles are actual center of ovum production or oogenesis. Each primary oocyte is surrounded by a layer of granulosa cells and then called the primary follicle. Follicles are usually located directly beneath the cortex of the ovary. They secret estrogen. But once they begin to mature, they migrate towards the inner medulla. The medulla consists of layers of soft stromal tissue. The stromal tissue contains rich supply of blood vessels, nerves and lymph vessels.

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