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level: Physiology of Menstruation: C. Endometrial Cycle

Questions and Answers List

level questions: Physiology of Menstruation: C. Endometrial Cycle

Question	Answer
First phase of menstrual cycle (proliferative):	Immediately after a menstrual flow (which occurs during the first 4 or 5 days of a cycle), the endometrium, or lining of the uterus, is very thin, approximately one cell layer in depth.
First phase of menstrual cycle (proliferative): As ovary begins to produce estrogen, endometrium begins to proliferate (from approximately day 5 to day 14) to _____ its thickness	increases or approximately 8 folds
Second Phase of Menstrual Cycle (Secretory): after ovulation the _______ in the corpus luteum (under the direction of LH) causes the glands of the uterine endometrium to become corkscrew or twisted in appearance and dilated.	formation of progesteron
Second Phase of Menstrual Cycle (Secretory): The capillaries of the endometrium increase in amount until the lining?	takes on the appearance of rich, spongy velvet.
Third Phase of Menstrual Cycle (Ischemic): If fertilization does not occur, the corpus luteum in the ovary begins to regress after?	8 to 10 days.
Third Phase of Menstrual Cycle (Ischemic): As corpus luteum regresses, the production of progesterone and estrogen ____	decreases.
Third Phase of Menstrual Cycle (Ischemic): With the _____ of stimulation, the endometrium of the uterus begins to degenerate (at approximately day 24 or 25 of the cycle).	Withdrawal of progesteron
Third Phase of Menstrual Cycle (Ischemic): The capillaries, rupture, with minute ______< and the endometrium sloughs off.	hemorrhages
fourth phase of a menstrual cycle (Menses): menses, or the menstrual flow, is composed of:	a 'blood' from the ruptured capillaries b 'mucin' from the glands c Fragments of 'endometrial tissue d The microscopic, atrophied, and 'unfertilized ovum
fourth phase of a menstrual cycle (Menses): menses is actually the end of an?	arbitrarily defined menstrual cycle.
Because menses is the only external marker of the cycle, however, the first day of menstrual flow is used to mark the?	beginning day of a new menstrual cycle.
The iron loss in a typical menstrual flow is approximately?	11 mg