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Question

In the given diagram of a section of the Graafian follicle, different parts are labelled by A-F. Choose the option in which all the alphabets have been correctly matched.



A

A: Membrane granulosa; B: Theca interna; C: Ovum; D: Membrane granulosa; E: Antrum; F: Theca externa

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B
A: Theca interna; B: Theca externa; C: Ovum; D: Membrane granulosa; E: Antrum; F: Cumulus oophorus
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C
A: Theca externa; B: Theca interna; C: Secondary oocyte; D: Cumulus oophorus; E: Antrum; F: Membrane granulosa
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D
A: Membrane granulosa; B: Theca interna; C: Secondary oocyte; D: Theca externa; E: Antrum; F: Cumulus oophorus
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Solution

The correct option is C A: Theca externa; B: Theca interna; C: Secondary oocyte; D: Cumulus oophorus; E: Antrum; F: Membrane granulosa

Tertiary follicle grows further into Graafian follicle with large follicular cavity or antrum that is filled by a liquid called as liquor folliculi.

Theca externa is the outermost layer of the folliculi. It is made up of connective tissues that contribute structural support to the growing follicle.

Theca interna is the inner layer that borders membrane granulosa cells and it functions as an endocrine structure that produces estrogen. Theca interna also expresses receptors for LH (Luteinizing hormones).

Secondary oocyte is the structure that is released upon rupturing of the Graafian follicle by the process of ovulation.

Granulosa cells of the ovulatory follicle are an exclusive source of estrogen in the follicular phase of the ovarian cycle.

Antrum is the cavity present in the follicle that is filled with follicular liquid. The presence of follicular cavity is a sign of follicle maturity.

Cumulus oophorus is the columnar extension of granulosa cells that attaches the oocyte with that of the follicle wall.


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