Question

1

Which statement about the hormonal events of the ovarian cycle is correct?

a)The luteinizing hormone surge stimulates the secondary oocyte to form a primary oocyte

b)Decreased levels of follicle-stimulating hormone cause a rush of luteinizing hormone to be released

c)The luteinizing hormone surge stimulates the corpus luteum to produce progesterone

d)Progesterone is regulated by a positive feedback mechanism

2

Which events in the monthly female reproductive cycle occur simultaneously?

a)Menstruation and the estrogen surge

b)Endometrial proliferation and development of the vesicular follicle

c)Degeneration of the corpus luteum and increased LH and FSH secretion

d)The secretory phase in the uterus and decreased progesterone levels

Answer 1

1)Option C- The luteinizing hormone surge stimulates the corpus luteum to produce progesterone

LH hormone surge is occuring in the ovulation phase of the ovulatory cycle.

LH surge help in the ovulation( release of ovum from the matured follicle) and also it help in the stimulation of the corpus luteum to release the progesterone hormone which help in the endometrial proliferation and nurishment for the implantation

LH surge help in the release of secondary oocyte from the matured follicle(graffian or vesicualr follicle)

LH surge is due to the rise of estrogen hormone.

Progesterone is regulated by negative feedback mechanism

2)Option C - Degeneration of the corpus luteum and increased LH and FSH secretion

Degenration of the corpus luteum occurs when the released egg is not fertilised. this will result in the decreased secretion of the progesterone and estrogen .This fall in hormone signals the hypothalamus to release gonadotrophin releasing hormone(GNRH) which further act on the anterior pituitary to release the LH and FSH

Estrogen surge occure in the follicular /proliferative phase not in the menstrual phase

endometrial proliferation took place after the release of the ovum from the vesicular follicle

in the secretory phase of the menstrual cycle , the level of progesteron will be high, because during this phase the corpus luteum release large amount of progesterone for the endometrial proliferation