To determine:
The role of the corpus luteum in a menstrual cycle
Introduction:
Follicular cells in the ovary form a corpus luteum, which is a temporary endocrine glands that secrete both sex hormones, estrogen and progesterone, which inhibit the further release of GnRH, LH and FSH, to prevent the development of any more follicles.
To determine:
The role of corpus luteum in early pregnancy.
Introduction:
The corpus luteum is the structure that is formed by the remnants of follicle cells in the ovaries during the luteal phase. It is a temporary endocrine glands that secrete very low level of estrogen and a high level of progesterone. The corpus luteum is typically very large, the size ranges from 2 to 5 cm in diameter.
To determine:
The factor which determines corpus luteum survival after ovulation.
Introduction:
The corpus luteum is the structure that is formed by the ovarian follicles during luteal phase. It is a temporary endocrine glands that secretes very low level of estrogen and a high level of progesterone. The corpus luteum is typically very large, the size ranges from 2 to 5 cm in diameter.
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Biology
- Which oocyte stage is ovulated? What happens to it if it encounters a sperm cell there? What happens if it does not meet up with sperm?arrow_forwardDistinguish between: a. seminiferous tubule and vas deferens b. sperm and semen c. Leydig cells and Sertoli cells d. primary oocyte and secondary oocyte e. follicle and corpus luteum f. the three phases of the menstrual cyclearrow_forwardWhat changes occur in the endometrium during the ovarian cycle?arrow_forward
- Figure 43.17 Which of the following statements about the menstrual cycle is false? Progesterone levels rise during the luteal phase of the ovarian cycle and the secretory phase of the uterine cycle. Menstruation occurs just after LH and FSH levels peak. Menstruation occurs after progesterone levels drop. Estrogen levels rise before ovulation, while progesterone levels rise after.arrow_forwardOutline the roles of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in the ovarian cycle of a human female.arrow_forwardWhat uterine events are occurring when primary follicles are maturing during the follicular phase of ovarian cycle? What is the dominant ovarian hormone during: i. The follicular phase of the ovarian cycle? ii. The luteal phase of the ovarian cycle?arrow_forward
- Why does corpus luteum stay active throughout pregnancy and in the absence of fertilization, is active only for 10-12 days?arrow_forwardhow does the uterine and ovarian cycle combine to make the menstrual cycle? can you please explain it using a tree diagram(I think that's what its called). thank youarrow_forwardDuring the follocular phase of the ovarian cycle, what does an increase in estrogen concentrations correlate with? 1-The degradation of a follicle containing an egg(oocyte) 2-The formation of the corpus luteum 3-The maturation of a follicle containing an egg(oocyte) 4- The degradation of teh corpus luteumarrow_forward
- (1) Which of the following characterizes the proliferative phase of the menstrual cycle? I - Endometrium rebuilds itself II - Increased levels of LH and FSH III - Increased levels of progesterone IV - Ovulation (2) Which of the following characterizes the postovulatory phase of the Menstrual cycle? I - Vascularization of the endometrium II - Cervical plug formation III - Occurs during the 15th to 28th day IV - Decreased levels of progesterone (3) Which of the following correctly describes the digestive activity in the small intestine? I - Goblet cells secrete mucus II - Absorptive cells digest and absorb nutrients III - Brunner's glands secrete acidic fluid IV - Paneth cells secrete lysozymearrow_forwardWhat role does lactation have on the menstrual cycles?arrow_forwardWhat is the role of the corpus luteum in the first trimester of pregnancy?arrow_forward
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