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Questions and Answers
Which of the following layers is responsible for producing the hormone estrogen?
What occurs to the remaining part of the follicle after ovulation?
It changes into corpus luteum.
Match the following stages of maturation of primordial cells with their description:
Primary = Initial stage of ovarian follicle development Secondary = Follicle with multiple layers of cells Graafian Follicle = Mature follicle ready for ovulation
The Graafian follicle is also referred to as a secondary oocyte.
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The fluid between the oocyte and the membrana granulosa is called the ______.
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Study Notes
Maturation of Primordial Cell
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The primordial cell is a primary oocyte surrounded by a single layer of flattened follicular cells.
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The primary oocyte undergoes mitosis to become the secondary oocyte. It is still surrounded by a single layer of flattened follicular cells but now larger and more prominent with granulosa cells around it.
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The Graafian follicle is the mature follicle. The oocyte within it begins to move towards the surface of the ovary, preparing for ovulation.
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Once the oocyte is released, remaining parts of the follicle transform into the corpus luteum.
Structure of Graafian Follicle
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The Graafian follicle is also known as a secondary oocyte.
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The oocyte is surrounded by layers containing cells that produce important hormones:
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Zona pellucida: transparent layer secreted by the vitelline membrane. It forms a barrier between the oocyte and the surrounding environment.
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Theca Externa: outer protective layer made of fibrous connective tissue.
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Theca Interna: inner cellular layer, responsible for producing the hormone Estrogen.
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Membrana granulosa: layer of follicular cells directly surrounding the oocyte. These cells help to nourish and support the oocyte.
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Membrana granulosa: The membrana granulosa also forms the discus proligerus , a stalk of granulosa cells through which the oocyte is connected to the surrounding granulosa cell layer. The Corona Radiata sits around the oocyte and goes with it when it ovulates.
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Antrum: fluid-filled space between the oocyte and the membrana granulosa that contains nutrients and hormones.
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Description
Explore the fascinating process of primordial cell maturation and the structure of the Graafian follicle. This quiz covers key concepts such as the transformation from primary to secondary oocyte, the role of granulosa cells, and the formation of the corpus luteum after ovulation.
