General Embryology Ana 212: Fertilization and Cleavage
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Questions and Answers

What is the main focus of the ovarian cycle?

  • Release of the mature egg
  • Transformation of primordial follicle to graafian follicle (correct)
  • Secretion of luteinizing hormone (LH)
  • Development of the endometrium

Which hormone controls the ovarian cycle?

  • Progesterone
  • Estrogen
  • Human Chorionic Gonadotropin (hCG)
  • Luteinizing hormone (LH) and Follicle Stimulating hormone (FSH) (correct)

During which phase does the transformation of primordial follicle to graafian follicle occur?

  • Ovulatory phase
  • Follicular phase (correct)
  • Menstrual phase
  • Luteal phase

What characterizes the events of follicular development?

<p>Change of squamous epithelium surrounding the oocyte to cuboidal epithelium (D)</p> Signup and view all the answers

What hormone corresponds to the proliferative phase of the menstrual cycle?

<p>Estrogen (B)</p> Signup and view all the answers

What are the main interrelationships between the ovarian and uterine cycles?

<p>Synchronization in ovulation and menstruation (A)</p> Signup and view all the answers

What is the glycoprotein substance called that is secreted on the surface of the oocyte by the granulosa cells and oocyte?

<p>Zona pellucida (A)</p> Signup and view all the answers

During the follicular phase, what substance is secreted by the granulosa cells and theca interna that initiates the proliferative phase of the menstrual cycle?

<p>Oestrogen (B)</p> Signup and view all the answers

What structure is formed when fluid-filled spaces coalesce between the granulosa cells during follicular development?

<p>Antrum (D)</p> Signup and view all the answers

Which structure in the ovary secretes progesterone during the luteal phase of the menstrual cycle?

<p>Corpus luteum (C)</p> Signup and view all the answers

What process involves the release of the secondary oocyte from the ruptured graafian follicle?

<p>Ovulation (D)</p> Signup and view all the answers

What happens to the corpus luteum if pregnancy does not occur?

<p>It degenerates to become corpus albicans (C)</p> Signup and view all the answers

What hormone sustains the corpus luteum if pregnancy occurs?

<p>Human Chorionic Gonadotropin (HcG) (D)</p> Signup and view all the answers

What is formed by the ovarian stromal connective tissue around the granulosa cell during follicular development?

<p>Theca folliculi (C)</p> Signup and view all the answers

What structure drags the ovulated secondary oocyte into the fallopian tube?

<p>Fimbriae of the uterine tube (D)</p> Signup and view all the answers

What is rearranged around the granulosa cell to form two distinct layers during follicular development?

<p>Theca folliculi (D)</p> Signup and view all the answers

Flashcards

Ovarian cycle focus

Transformation of primordial follicle to graafian follicle.

Hormones controlling ovarian cycle

Luteinizing hormone (LH) and Follicle Stimulating hormone (FSH) regulate the ovarian cycle.

Follicular phase

The phase where primordial follicles develop into graafian follicles.

Follicular development characteristic

Change from squamous to cuboidal epithelium around the oocyte.

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Hormone of proliferative phase

Estrogen corresponds to the proliferative phase of the menstrual cycle.

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Ovarian and uterine cycles relationship

They synchronize in ovulation and menstruation.

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Glycoprotein around oocyte

Zona pellucida is secreted by granulosa cells and oocyte.

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Substance initiating proliferative phase

Oestrogen released by granulosa cells and theca interna triggers the proliferative phase.

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Antrum

A structure formed by fluid-filled spaces between granulosa cells during development.

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Progesterone secreting structure

Corpus luteum secretes progesterone during the luteal phase.

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Ovulation process

The release of the secondary oocyte from the ruptured graafian follicle.

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Corpus luteum after no pregnancy

It degenerates into corpus albicans if pregnancy does not occur.

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Hormone sustaining corpus luteum

Human Chorionic Gonadotropin (HcG) sustains it if pregnancy occurs.

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Theca folliculi

Formed by ovarian stromal connective tissue around granulosa cells.

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Fimbriae function

They drag the ovulated secondary oocyte into the fallopian tube.

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Rearrangement in follicular development

Theca folliculi is arranged around the granulosa cell.

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