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Questions and Answers
Which layer of the uterus is responsible for menstruation?
Which layer of the uterus is responsible for menstruation?
- Myometrium
- Endometrium (correct)
- Perimetrium
- Epimetrium
What is the function of the endometrium during implantation?
What is the function of the endometrium during implantation?
- To assist in implantation and contribute to the placenta (correct)
- To protect the developing embryo from harm
- To provide nutrients to the developing embryo
- To prevent the embryo from being rejected by the uterus
Which hormone is responsible for the secretory phase of the menstrual cycle?
Which hormone is responsible for the secretory phase of the menstrual cycle?
- Follicle-stimulating hormone
- Estrogen
- Progesterone (correct)
- Luteinizing hormone
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Study Notes
- The uterus has three layers: endometrium, myometrium, and perimetrium.
- The endometrium is rich in simple tubular glands.
- The menstrual cycle lasts approximately 28 days and is under hormonal control by the ovaries.
- The proliferative phase is influenced by estrogen and parallels growth of ovarian follicles.
- The secretory phase begins after ovulation in response to progesterone from the corpus luteum.
- If fertilization does not occur, the endometrium sheds (menstrual phase).
- If fertilization occurs, the endometrium assists in implantation and contributes to the placenta.
- The endometrium has three layers during implantation: compact, spongy, and basal.
- The blastocyst implants in the endometrium along the anterior or posterior wall of the uterus.
- The blastocyst becomes embedded between the openings of the glands in the endometrium.
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