Podcast
Questions and Answers
What is the purpose of granulosa cells in the formation of a primordial follicle?
What is the purpose of granulosa cells in the formation of a primordial follicle?
- To provide nutrients to the oocyte
- To protect the oocyte from damage
- To form a protective barrier around the oocyte (correct)
- To help the oocyte mature
How many primordial follicles are present at birth?
How many primordial follicles are present at birth?
- 2 million (correct)
- 4 million
- 6 million
- 8 million
What is the average number of ova that mature and release throughout a woman's reproductive life?
What is the average number of ova that mature and release throughout a woman's reproductive life?
- 200
- 400 (correct)
- 600
- 800
At what point in oogenesis does the first meiotic division occur?
At what point in oogenesis does the first meiotic division occur?
What happens to the first polar body during oogenesis?
What happens to the first polar body during oogenesis?
How does male spermatogenesis compare to female oogenesis in terms of gamete production?
How does male spermatogenesis compare to female oogenesis in terms of gamete production?
What is the main cause of chromosome wastage in oogenesis?
What is the main cause of chromosome wastage in oogenesis?
What happens to follicles that do not mature and ovulate?
What happens to follicles that do not mature and ovulate?
What marks the end of a woman's reproductive capacity?
What marks the end of a woman's reproductive capacity?
Which type of cell surrounds the primary oocyte to form a primordial follicle?
Which type of cell surrounds the primary oocyte to form a primordial follicle?
How many chromosomes do primary oocytes contain during fetal life?
How many chromosomes do primary oocytes contain during fetal life?
What happens to the secondary oocyte during oogenesis?
What happens to the secondary oocyte during oogenesis?
Study Notes
- Primary oocytes form during fetal life and contain 46 replicated chromosomes.
- Each primary oocyte is surrounded by granulosa cells to form a primordial follicle.
- Only about 2 million primordial follicles remain at birth, serving as a reservoir for ova production.
- The follicular pool gradually dwindles away, with only about 400 ova maturing and releasing throughout a woman's reproductive life.
- Oogenesis involves the enlargement of the primary oocyte and completion of the first meiotic division just before ovulation.
- The secondary oocyte becomes the ovum, retaining all nutrient-rich cytoplasm, while the first polar body degenerates.
- Male spermatogenesis produces several hundred million sperm in a single day, in contrast to female gamete potential.
- Considerable chromosome wastage occurs in oogenesis compared to spermatogenesis.
- Follicles can either mature and ovulate or degenerate to form scar tissue.
- Menopause marks the end of a woman's reproductive capacity.
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