The correct sequence of the various phases of a typical menstrual cycl...
The correct sequence of the various phases of a typical menstrual cycle is:
- Menstrual
- Follicular
- Ovulatory
- Secretory
Explanation:
- Menstrual phase: Shedding of the uterine lining
- Follicular phase: Maturation of follicles in the ovary
- Ovulatory phase: Release of an egg from the ovary
- Secretory phase: Preparation of the uterus for possible pregnancy by thickening the lining
Therefore, the correct sequence is Menstrual → Follicular → Ovulatory → Secretory, which corresponds to option B.
View all questions of this test
The correct sequence of the various phases of a typical menstrual cycl...
Menstrual Cycle Phases:
Menstrual Phase:
- The menstrual cycle begins with the menstrual phase, where the uterine lining sheds, resulting in menstruation (bleeding).
- This phase typically lasts for 3-7 days.
Follicular Phase:
- Following menstruation, the follicular phase begins, during which the pituitary gland releases follicle-stimulating hormone (FSH) that stimulates the growth of ovarian follicles.
- One dominant follicle will continue to develop and release estrogen, preparing the uterine lining for a potential pregnancy.
- This phase usually lasts for about 7-21 days.
Ovulatory Phase:
- The ovulatory phase occurs around the middle of the menstrual cycle when the matured egg is released from the dominant follicle in a process called ovulation.
- This phase is triggered by a surge in luteinizing hormone (LH) and typically lasts for 1-2 days.
Secretory Phase:
- After ovulation, the secretory phase begins, where the ruptured follicle transforms into a structure called the corpus luteum.
- The corpus luteum produces progesterone, which helps maintain the uterine lining in preparation for a possible implantation of a fertilized egg.
- If fertilization does not occur, the corpus luteum will degenerate, leading to a drop in hormone levels and the start of a new menstrual cycle.
- This phase usually lasts for around 14 days.
Therefore, the correct sequence of the various phases of a typical menstrual cycle is: Menstrual → Follicular → Ovulatory → Secretory.