Question:
The figure shows a section of human ovary. Select the option which gives the correct identification of either A or B with function/characteristic.
The figure shows a section of human ovary. Select the option which gives the correct identification of either A or B with function/characteristic.
Updated On: Jul 13, 2024
- B- Corpus luteum - Secretes progesterone
- A- Tertiary follicle - Forms Graafian follicle
- B- Corpus luteum - Secretes estrogen
- A- Primary oocyte - It is in the prophase-1 of the meiotic division
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The Correct Option is A
Solution and Explanation
The zona granulosa and theca cells of Graafian follicle remaining in the ovary after ovulation and some surrounding capillaries and connective tissue evolve into the corpus luteum (a temporary endocrine gland). The corpus luteum produces progesterone and, in the event of fertilization, provides the required progesterone until the placenta is formed. In the absence of fertilization, the life span of the corpus luteum is 14 days. It then degenerates into a corpus albicans, which is mainly a scar tissue.
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Concepts Used:
Menstrual cycle
Menstrual cycle is the monthly series of changes a woman's body goes through while having a possibility of pregnancy. Each month one egg is released by the and this process is called ovulation. If ovulation takes place and the egg isn't fertilized, the lining of the uterus sheds through the vagina. This is a menstrual period.
Menstrual cycle irregularities can have many different causes, including:
- Pregnancy or breast-feeding.
- Eating disorders, extreme weight loss or excessive exercising.
- Polycystic ovary syndrome (PCOS)
- Premature ovarian failure
- Pelvic inflammatory disease (PID)
- Uterine fibroids