BIOL 2020U Lecture Notes - Glycoprotein, Acrosome, Epithelium
43 views2 pages
Document Summary
Anterior pituitary gland is secreting follicle-stimulating hormone fsh. Stimulates development (division) of follicle cells surrounding oocyte. Stimulates proliferation of endometrium and its blood supply. Stimulates anterior pituitary gland to secrete luteinising hormone lh. Inhibits further secretion of fsh by negative feedback. Mature ovarian follicle bursts and releases secondary oocyte (now called ovum!) Corpus luteum forms from remaining follicle cells in ovary. Ovum passes down fallopian tube/oviduct towards uterus; fertilization now possible: happens once a month, menstrual cycle 28days, each ovary alternatively releases an ovum every 56days ( 56/2) Progesterone continues to stimulate: profileration of endometrium and its blood supply, development of nutrient fluid glands in uterus lining. High levels of sex hormones inhibit secretion of lsh and lh. Corpus luteum degenerates \ levels of sex hormones fall. Uterus lining breaks down; fsh is not inhibited anymore cycle starts again. Menstruation [days1-5] endometrium breaks down: low levels of female sex hormones causes.
Get access
Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers
Related Questions
1. The site of implantation of a fertilized ovum is
A.The uterus |
B.. | The ovaries |
C. | The vag ina |
D. | The cervix |
2. Which statement correctly describes the secretory phase of the uterine (menstrual) cycle?
A. | Follicle stimulating hormone stimulates proliferation of the endometrium |
B. | During this phase, the endometrium detaches and sheds |
C. | Progesterone stimulates the endometrium to prepare for implantation |
D. | Decreased progesterone levels cause the endometrial cells to die |
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 |
Please give some explanations, thanks.