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Questions and Answers
Which layer of the uterus is responsible for changes during the menstrual cycle?
Which layer of the uterus is responsible for changes during the menstrual cycle?
- Endometrium (correct)
- None of the above
- Perimetrium
- Myometrium
During which phase of the menstrual cycle does shedding of the endometrium occur?
During which phase of the menstrual cycle does shedding of the endometrium occur?
- Proliferative phase
- Menstrual phase (correct)
- Secretory phase
- None of the above
Which layer of the endometrium is responsible for assisting in implantation and contributing to formation of the placenta?
Which layer of the endometrium is responsible for assisting in implantation and contributing to formation of the placenta?
- Thin basal layer
- Superficial compact layer (correct)
- None of the above
- Intermediate spongy layer
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Study Notes
- The uterus has three layers: endometrium, myometrium, and perimetrium.
- The endometrium undergoes changes in a 28-day cycle under hormonal control by the ovaries.
- The proliferative phase is under the influence of estrogen and parallels growth of the ovarian follicles.
- The secretory phase begins after ovulation in response to progesterone produced by the corpus luteum.
- If fertilization does not occur, shedding of the endometrium occurs during the menstrual phase.
- If fertilization occurs, the endometrium assists in implantation and contributes to formation of the placenta.
- At the time of implantation, the mucosa of the uterus is in the secretory phase.
- Three distinct layers can be recognized in the endometrium: a superficial compact layer, an intermediate spongy layer, and a thin basal layer.
- Normally, the human blastocyst implants in the endometrium along the anterior or posterior wall of the body of the uterus.
- The blastocyst becomes embedded between the openings of the glands in the endometrium.
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