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A decrease in the level of oestrogen and progesterone causes
- a)Growth and dilation of myometrium
- b)Growth of endometrium
- c)Constriction of uterine blood vessels leading to sloughing of endometrium or uterine epithelium
- d)Release of ovum from the ovary.
Correct answer is option 'C'. Can you explain this answer?
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A decrease in the level of oestrogen and progesterone causesa)Growth ...
Answer: C. Constriction of uterine blood vessels leading to sloughing of endometrium or uterine epitheliumExplanation:- Oestrogen and progesterone are female sex hormones that play crucial roles in the menstrual cycle and reproduction.- The levels of these hormones fluctuate throughout the menstrual cycle to facilitate various processes.Effects of decreased oestrogen and progesterone levels:- Constriction of uterine blood vessels: A decrease in oestrogen and progesterone levels leads to the constriction of blood vessels in the uterus, reducing the supply of blood and nutrients to the endometrium.- Sloughing of endometrium: Due to the reduced blood supply, the endometrium (the lining of the uterus) starts to break down and is eventually shed from the uterus during menstruation.- Menstruation: This shedding of the endometrium is known as menstruation or the menstrual period, which is a natural process that occurs monthly in women of reproductive age.Effects not caused by decreased oestrogen and progesterone levels:- Growth and dilation of myometrium: This process is associated with the preparation of the uterus for childbirth and is not directly related to decreased hormone levels during the menstrual cycle.- Growth of endometrium: The growth of the endometrium is stimulated by increased levels of oestrogen during the first half of the menstrual cycle, not by decreased levels.- Release of ovum from the ovary: The release of an ovum (egg) from the ovary, known as ovulation, is triggered by a surge in luteinizing hormone (LH) and occurs before the decrease in oestrogen and progesterone levels.
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A decrease in the level of oestrogen and progesterone causesa)Growth and dilation of myometriumb)Growth of endometriumc)Constriction of uterine blood vessels leading to sloughing of endometrium or uterine epitheliumd)Release of ovum from the ovary.Correct answer is option 'C'. Can you explain this answer?
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