Ovulation and Fertilization Process
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Questions and Answers

What is the primary function of the ovaries?

  • To produce milk for the newborn
  • To transport the fertilized egg to the uterus
  • To provide a passageway for intercourse
  • To produce female gametes (oocytes) and hormones (correct)

Which structure in the ovary is responsible for the final stage of oocyte maturation?

  • Ovarian cortex (correct)
  • Tunica albuginea
  • Germinal epithelium
  • Ovarian medulla

What is the primary role of estrogen secreted by the ovaries?

  • To inhibit the development of sperm
  • To stimulate the growth of the uterine lining (correct)
  • To produce milk for the newborn
  • To facilitate the transport of the fertilized egg

What is the function of the corpus luteum?

<p>To produce progesterone and inhibin (B)</p> Signup and view all the answers

Which hormone is responsible for triggering ovulation?

<p>Luteinizing hormone (LH) (C)</p> Signup and view all the answers

What is the role of the follicles in the ovary?

<p>To support the development and maturation of the oocytes (B)</p> Signup and view all the answers

What is the first stage of follicular development?

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

What triggers the final division of chromosomal material in the secondary oocyte, leading to the formation of a zygote?

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

What is the function of the corpus luteum?

<p>To secrete progesterone (C)</p> Signup and view all the answers

During which stage of the menstrual cycle does the corpus luteum form?

<p>Ovulatory phase (C)</p> Signup and view all the answers

What is the primary function of estrogen during the menstrual cycle?

<p>To stimulate the growth of follicles (A)</p> Signup and view all the answers

What is the main difference between oogonia and primary oocytes?

<p>Oogonia are the precursors to primary oocytes, which develop during oogenesis (C)</p> Signup and view all the answers

What is the primary function of the granulosa cells in the mature follicle?

<p>To provide a blood supply to the follicular cells and deliver hormones (B)</p> Signup and view all the answers

Which of the following is the correct sequence of events during oogenesis?

<p>Primordial follicle &gt; Primary oocyte &gt; Secondary oocyte &gt; Ovum (C)</p> Signup and view all the answers

What is the primary role of the corpus luteum during the reproductive cycle?

<p>To secrete progesterone and maintain the uterine lining (B)</p> Signup and view all the answers

What is the main function of the zona pellucida surrounding the primary oocyte?

<p>To allow sperm entry and fertilization (A)</p> Signup and view all the answers

What is the primary function of the theca cells in the mature follicle?

<p>To secrete estrogen in response to FSH (D)</p> Signup and view all the answers

How do the levels of estrogen change during the menstrual cycle?

<p>Estrogen levels increase during the follicular phase and decrease during the luteal phase (B)</p> Signup and view all the answers

What is the primary function of the fimbriae at the end of the fallopian tube?

<p>To sweep the secondary oocyte into the fallopian tube after ovulation (B)</p> Signup and view all the answers

What is the primary role of the uterine tube (fallopian tube) in the reproductive process?

<p>To transport the secondary oocyte from the ovary to the uterus (C)</p> Signup and view all the answers

What is the main function of the corpus luteum after ovulation?

<p>To secrete progesterone and maintain the uterine lining (C)</p> Signup and view all the answers

How does the presence of the corpus luteum affect the levels of estrogen and progesterone during the menstrual cycle?

<p>The corpus luteum increases the level of progesterone and decreases the level of estrogen (A)</p> Signup and view all the answers

Flashcards

Ovaries

The female reproductive organ that produces oocytes (eggs) and hormones, primarily estrogen and progesterone.

Ovarian Cortex

The outer layer of the ovary where the oocytes develop and mature.

Estrogen

The main hormone produced by the ovaries responsible for stimulating the growth of the uterine lining and secondary sexual characteristics.

Corpus Luteum

A temporary structure formed after ovulation that produces progesterone and inhibin, essential for maintaining pregnancy.

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Luteinizing Hormone (LH)

The hormone primarily responsible for triggering ovulation, the release of an egg from the ovary.

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Follicles

Fluid-filled sacs within the ovary that support the development and maturation of oocytes.

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Primordial Follicle

The first stage in the development of a follicle, containing a single primordial oocyte.

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Fertilization

The union of a sperm cell with an egg cell, which triggers the final division of chromosomal material in the oocyte, resulting in a zygote.

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Progesterone

The main hormone produced by the corpus luteum, crucial for maintaining the uterine lining during pregnancy.

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Ovulatory Phase

The period in the menstrual cycle when ovulation occurs.

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Estrogen during the Menstrual Cycle

The hormone predominantly responsible for stimulating the growth and development of follicles during the follicular phase of the menstrual cycle.

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Oogonia

Immature, germ cells that give rise to primary oocytes during oogenesis.

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Primary Oocytes

Mature, non-dividing oocytes that have completed meiosis I.

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Granulosa Cells

Specialized cells that surround the oocyte within the mature follicle, providing nutrients and hormones.

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Oogenesis

The sequence of events that lead to the development of a mature egg, starting with primordial follicles and ending with an ovum.

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Corpus Luteum During the Cycle

The main function of the corpus luteum during the reproductive cycle is to produce progesterone and maintain the uterine lining, preparing it for potential pregnancy.

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Zona Pellucida

A thick, glycoprotein layer surrounding the primary oocyte, which allows sperm entry and fertilization.

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Theca Cells

Cells surrounding the follicle that respond to follicle-stimulating hormone (FSH) and produce estrogen.

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Estrogen Levels During the Cycle

Estrogen levels rise during the follicular phase of the menstrual cycle, aiding follicular growth, and decline during the luteal phase.

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Fimbriae

Finger-like projections at the end of the fallopian tube that capture the secondary oocyte after ovulation.

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Uterine Tube (Fallopian Tube)

The tube that transports the secondary oocyte from the ovary to the uterus, where fertilization can occur.

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Corpus Luteum After Ovulation

After ovulation, the corpus luteum continues to secrete progesterone, helping to maintain the uterine lining in preparation for a potential pregnancy.

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Corpus Luteum's Effects on Hormones

The presence of the corpus luteum increases progesterone levels, which are needed for maintaining the uterine lining, and decreases estrogen levels for the duration of the luteal phase.

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