Reproductive Physiology

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Questions and Answers

During which phase of the oestrus cycle in rats does ovulation occur?

  • Oestrus (correct)
  • Late dioestrus
  • Early dioestrus
  • Proestrus

What is the main effect of estrogen during oestrus in rats?

  • Inhibition of cornification
  • Increase in leukocytes
  • Thickening of vaginal epithelium (correct)
  • Breakdown of glycogen

Which phase of the oestrus cycle in rats is characterized by the regression of the corpus luteum if fertilization and implantation have not occurred?

  • Proestrus
  • Oestrus
  • Early dioestrus
  • Late dioestrus (correct)

Which hormone stimulates the growth of the endometrium in preparation for implantation of a fertilized oocyte?

<p>Estrogen (B)</p> Signup and view all the answers

What is the approximate weight of an estrogen-treated uterus compared to a progesterone-treated uterus?

<p>Approximately 0.5-1% total body weight (C)</p> Signup and view all the answers

Which gland secretes alkaline fluid into the urethra to neutralize the acidic environment of the vagina?

<p>Prostate gland (D)</p> Signup and view all the answers

What is the function of the seminal vesicle fluid in semen?

<p>Contains nutrients and fibrinogen (B)</p> Signup and view all the answers

Which phase of the oestrus cycle in rats is characterized by the appearance of leukocytes in the vaginal epithelium?

<p>Early dioestrus (B)</p> Signup and view all the answers

What is the main effect of progesterone during proestrus in rats?

<p>Inhibits cornification (B)</p> Signup and view all the answers

What is the approximate percentage of cornified epithelial cells during oestrus in rats?

<p>90% (D)</p> Signup and view all the answers

Which phase of the oestrus cycle in rats is characterized by the regression of the corpus luteum if fertilization and implantation have not occurred?

<p>Late dioestrus (A)</p> Signup and view all the answers

What is the main effect of estrogen during oestrus in rats?

<p>Thickening of vaginal epithelium (C)</p> Signup and view all the answers

What is the approximate percentage of nucleated epithelial cells during proestrus in rats?

<p>80% (D)</p> Signup and view all the answers

What is the approximate percentage of cornified epithelial cells during early dioestrus in rats?

<p>70% (B)</p> Signup and view all the answers

What is the approximate percentage of leukocytes during late dioestrus in rats?

<p>90% (A)</p> Signup and view all the answers

What is the approximate percentage of nucleated epithelial cells during late dioestrus in rats?

<p>5% (C)</p> Signup and view all the answers

What is the approximate percentage of cornified epithelial cells during proestrus in rats?

<p>30% (C)</p> Signup and view all the answers

Which hormone is responsible for maintaining the endometrial layer growth under the influence of estrogen, but does not stimulate any further growth?

<p>Progesterone (A)</p> Signup and view all the answers

What is the main function of the prostate gland in the male reproductive system?

<p>Secretes alkaline fluid into the urethra to neutralize the acidic environment of the vagina (B)</p> Signup and view all the answers

What is the approximate weight of an estrogen-treated rat uterus compared to a progesterone-treated rat uterus?

<p>Estrogen-treated uterus is approximately 0.5-1% of the total body weight (A)</p> Signup and view all the answers

Which gland secretes mucoproteins released prior to ejaculation, neutralizing urine in the urethra and providing lubrication?

<p>Bulbourethral gland (A)</p> Signup and view all the answers

Which hormone is responsible for stimulating the growth of the endometrium in preparation for implantation of a fertilized oocyte?

<p>Estrogen (C)</p> Signup and view all the answers

What is the main function of the seminal vesicle fluid in semen?

<p>Provides nutrients for sperm (B)</p> Signup and view all the answers

Which hormone is secreted by the blastocyst shortly after implantation and maintains the corpus luteum for the secretion of estrogen and progesterone?

<p>hCG (A)</p> Signup and view all the answers

What is the main function of the epididymis in the male reproductive system?

<p>Stores mature sperm (B)</p> Signup and view all the answers

What is the main function of the vas deferens in the male reproductive system?

<p>Carries sperm from the tail of the epididymis to the prostate gland (B)</p> Signup and view all the answers

What is the main function of the prostate-specific antigen (PSA) secreted by the prostate gland?

<p>Breaks down clotted semen for swimming into the uterus (D)</p> Signup and view all the answers

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