Answer each question by placing a mark in the appropriate space on the computer answer sheet

BIOL 238

Sample Questions

The Reproductive System

Text Box: Questions 1 through 6 apply to ovarian cycle diagram below:

1. Which structure is present at birth.

Use letters A through E only.

2. Which letter shows a primary follicle?

Use letters A through E only.

3. A primordial follicle contains:

(A) primary oocyte

(B) secondary oocyte

(D) ovum.

4. Which structure produces both estrogen and progesterone?

(Use letters from diagram)

5. The membrane (dark line) around D is the:

(A) septum pellucidum, (B) zona pellucida, (C) zona reticulata, (D) corona radiata,

6. Letter E represents a:

(A) primordial follicle, (B) secondary follicle, (C) Graafian follicle, (D) corpus luteum,

(E) corpus albicans

7. Meiosis I is completed as a result of the action of:

(A) FSH, (B) LH, (C) GH, (D) estrogen, (E) penetration of a spermatozoan.

8. Which of the following contains the diploid number of chromosomes:

(A) spermatogonia, (B) primary spermatocyte, (C) seconday spermatocyte, (D) all of these,

(E) A and B only.

9. The proliferative phase is caused by direct action of _____ on the endometrium.

(A) FSH, (B) LH, (C) GH, (D) estrogen, (E) progesterone, (F) both D and E.

10. Once the corpus luteum breaks down it becomes the:

(A) primordial follicle, (B) corpus albicans, (C) secondary oocyte, (D) ovum, (E) Graafian follicle.

11, 12. The corpus luteum is maintained during early pregnancy by ___(11)___ which comes from the ___(12)___.

Answers for #11: (A) estrogen, (B) progesterone, (C) HCG, (D) all of these, (E) A and B only.

Answers for #12: (A) hypothalamus, (B) ant. pituitary, (C) uterus, (D) tissues of the blastocyst.

13. The _____ thickens to about five times its minimum size during the ovulatory cycle.

(A) stratum basalis, (B) stratum functionalis, (C) cervix, (D) all of the above, (E) A and B only.

14. The maternal portion of the placenta is derived from the:

(A) stratum basalis, (B) decidua basalis, (C) zona pellucidum, (D) corona radiata.

15. The hormone ___ is primarily responsible for breast development during pregnancy.

(A) Growth Hormone, (B) prolactin, (C) oxytocin, (D) androgen.

16,17. The substance ___(16)___ from the sustentacular cells works together with ___(17)___ from the interstitial cells to stimulate spermatogenesis.

(A) testosterone, (B) FSH, (C) ABP, (D) ICSH

18. The gland which produces fluid containing acid phosphatase to activate sperm:

(A) seminal vesicle, (B) prostate, (C) epididymis, (D) glans penis, (E) bulbourethral gland.

19. The _____ acts as a radiator to absorb heat from the testicular artery and maintain low testicular temperature.

(A) cremaster muscle, (B) vas deferens, (C) pampiniform plexus, (D) prostate gland.

20. The sperm’s flagellum is derived from:

(A) mitrochondria, (B) centrioles, (C) nucleus, (D) lysosomes.

21. The _____ develops into the fetal portion of the placenta.

(A) amnion, (B) decidua basalis, (C) corona radiata, (D) zona pellucida, (E) chorion.

22. The _____ is a membrane which produces a cavity surrounding the embryo and eventually the fetus.

(A) amnion, (B) decidua basalis, (C) corona radiata, (D) zona pellucida, (E) chorion.

23. Chorionic villi are surrounded by _____ in the placenta.

(A) blood-filled lacunae, (B) the yolk sac, (C) the corona radiata, (D) the zona pellucida.

24. The _____ rearranges its molecular structure in the cortical reaction to prevent further sperm from entering the oocyte. (A) amnion, (B) decidua basalis, (C) corona radiata, (D) zona pellucida.

25. Fertilization normally occurs in the _____.

(A) fundus of the uterus, (B) ampulla of the fallopian tube, (C) fimbriae of the fallopian tube,

(D) corpus luteum.