27 Questions
During which phase of the oestrus cycle in rats does ovulation occur?
Oestrus
What is the main effect of estrogen during oestrus in rats?
Thickening of vaginal epithelium
Which phase of the oestrus cycle in rats is characterized by the regression of the corpus luteum if fertilization and implantation have not occurred?
Late dioestrus
Which hormone stimulates the growth of the endometrium in preparation for implantation of a fertilized oocyte?
Estrogen
What is the approximate weight of an estrogen-treated uterus compared to a progesterone-treated uterus?
Approximately 0.5-1% total body weight
Which gland secretes alkaline fluid into the urethra to neutralize the acidic environment of the vagina?
Prostate gland
What is the function of the seminal vesicle fluid in semen?
Contains nutrients and fibrinogen
Which phase of the oestrus cycle in rats is characterized by the appearance of leukocytes in the vaginal epithelium?
Early dioestrus
What is the main effect of progesterone during proestrus in rats?
Inhibits cornification
What is the approximate percentage of cornified epithelial cells during oestrus in rats?
90%
Which phase of the oestrus cycle in rats is characterized by the regression of the corpus luteum if fertilization and implantation have not occurred?
Late dioestrus
What is the main effect of estrogen during oestrus in rats?
Thickening of vaginal epithelium
What is the approximate percentage of nucleated epithelial cells during proestrus in rats?
80%
What is the approximate percentage of cornified epithelial cells during early dioestrus in rats?
70%
What is the approximate percentage of leukocytes during late dioestrus in rats?
90%
What is the approximate percentage of nucleated epithelial cells during late dioestrus in rats?
5%
What is the approximate percentage of cornified epithelial cells during proestrus in rats?
30%
Which hormone is responsible for maintaining the endometrial layer growth under the influence of estrogen, but does not stimulate any further growth?
Progesterone
What is the main function of the prostate gland in the male reproductive system?
Secretes alkaline fluid into the urethra to neutralize the acidic environment of the vagina
What is the approximate weight of an estrogen-treated rat uterus compared to a progesterone-treated rat uterus?
Estrogen-treated uterus is approximately 0.5-1% of the total body weight
Which gland secretes mucoproteins released prior to ejaculation, neutralizing urine in the urethra and providing lubrication?
Bulbourethral gland
Which hormone is responsible for stimulating the growth of the endometrium in preparation for implantation of a fertilized oocyte?
Estrogen
What is the main function of the seminal vesicle fluid in semen?
Provides nutrients for sperm
Which hormone is secreted by the blastocyst shortly after implantation and maintains the corpus luteum for the secretion of estrogen and progesterone?
hCG
What is the main function of the epididymis in the male reproductive system?
Stores mature sperm
What is the main function of the vas deferens in the male reproductive system?
Carries sperm from the tail of the epididymis to the prostate gland
What is the main function of the prostate-specific antigen (PSA) secreted by the prostate gland?
Breaks down clotted semen for swimming into the uterus
Quiz: Effects of Progesterone and Estrogen on Vaginal Epithelial Cells Test your knowledge on the reproductive and endocrine physiology lab findings regarding the effects of progesterone and estrogen on vaginal epithelial cells. Learn about the changes in cell morphology and glycogen content, as well as the role of progesterone in inhibiting cornification.
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