Structure of the Skeletal Muscle

NEET Reproductive Biology MCQ Test

1. Male Reproductive System

1. Which gland secretes fructose-rich seminal fluid?

a) Prostate b) Seminal vesicle c) Bulbourethral gland d) Cowper's gland

Correct answer: b) Seminal vesicle. The seminal vesicles secrete a fructose-rich fluid that provides energy for sperm motility.

2. Leydig cells secrete:

a) Estrogen b) Testosterone c) FSH d) Progesterone

Correct answer: b) Testosterone. Leydig cells in the testes produce testosterone, the primary male sex hormone.

3. Sperm maturation occurs in the:

a) Seminiferous tubules b) Epididymis c) Vas deferens d) Ejaculatory duct

Correct answer: b) Epididymis. Sperm gain motility and mature as they pass through the epididymis.

2. Female Reproductive System

4. Fertilization occurs in the:

a) Ovary b) Uterus c) Fallopian tube d) Cervix

Correct answer: c) Fallopian tube. Fertilization typically occurs in the ampulla of the fallopian tube.

5. The hormone responsible for ovulation is:

a) FSH b) LH c) Progesterone d) Estrogen

Correct answer: b) LH. The LH surge triggers ovulation.

6. Endometrium is shed during:

a) Ovulation b) Menstruation c) Implantation d) Fertilization

Correct answer: b) Menstruation. The endometrial lining sheds during the menstrual phase.

3. Ultra Structure of Testis and Ovary

7. Sertoli cells are found in the:

a) Epididymis b) Seminiferous tubules c) Prostate d) Vas deferens

Correct answer: b) Seminiferous tubules. Sertoli cells are found in the seminiferous tubules where they support spermatogenesis.

8. The Graafian follicle contains:

a) Primary oocyte b) Secondary oocyte c) Oogonium d) Polar body

Correct answer: b) Secondary oocyte. The Graafian follicle contains a secondary oocyte arrested in metaphase II.

9. Blood-testis barrier is formed by:

a) Leydig cells b) Sertoli cells c) Spermatogonia d) Theca cells

Correct answer: b) Sertoli cells. Tight junctions between Sertoli cells form the blood-testis barrier.

4. Spermatogenesis

10. Spermatogonia are:

a) Haploid b) Diploid c) Triploid d) Polyploid

Correct answer: b) Diploid. Spermatogonia are diploid stem cells that undergo mitosis.

11. Meiosis II in spermatogenesis produces:

a) Spermatids b) Secondary spermatocytes c) Primary spermatocytes d) Spermatozoa

Correct answer: a) Spermatids. Meiosis II produces haploid spermatids from secondary spermatocytes.

12. Spermiogenesis is the transformation of:

a) Spermatogonia → Spermatocytes b) Spermatids → Spermatozoa c) Spermatocytes → Spermatids d) Spermatozoa → Spermatogonia

Correct answer: b) Spermatids → Spermatozoa. Spermiogenesis is the final maturation of spermatids into spermatozoa.

5. Oogenesis

13. Primary oocyte is arrested at:

a) Prophase I b) Metaphase I c) Prophase II d) Metaphase II

Correct answer: a) Prophase I. Primary oocytes remain arrested in prophase I from fetal life until puberty.

14. Second polar body is released after:

a) Ovulation b) Fertilization c) Implantation d) Menstruation

Correct answer: b) Fertilization. The secondary oocyte completes meiosis II only after fertilization, releasing the second polar body.

15. Number of functional eggs per oogonium:

a) 1 b) 2 c) 3 d) 4

Correct answer: a) 1. Each oogonium produces only one functional ovum and 2-3 polar bodies.

6. Follicular Development

16. Correct sequence of follicular stages:

a) Primordial → Primary → Secondary → Graafian b) Primary → Graafian → Secondary → Primordial c) Graafian → Primary → Secondary → Primordial d) Secondary → Primordial → Graafian → Primary

Correct answer: a) Primordial → Primary → Secondary → Graafian. This is the correct sequence of follicular development.

17. Corpus luteum secretes:

a) hCG b) Estrogen and progesterone c) FSH and LH d) Testosterone

Correct answer: b) Estrogen and progesterone. The corpus luteum secretes these hormones to maintain the uterine lining.

18. Theca interna cells produce:

a) Estrogen b) Progesterone c) Androgens d) Inhibin

Correct answer: c) Androgens. Theca cells produce androgens which are converted to estrogen by granulosa cells.

7. Menstrual Cycle

19. LH surge triggers:

a) Menstruation b) Ovulation c) Implantation d) Fertilization

Correct answer: b) Ovulation. The LH surge causes ovulation about 24-36 hours later.

20. Progesterone peaks during:

a) Follicular phase b) Luteal phase c) Menstrual phase d) Proliferative phase

Correct answer: b) Luteal phase. Progesterone is highest during the luteal phase after ovulation.

21. Endometrium thickens in the:

a) Secretory phase b) Proliferative phase c) Menstrual phase d) Ovulatory phase

Correct answer: b) Proliferative phase. The endometrium grows under estrogen influence during this phase.

8. Fertilization

22. Sperm penetrates the ovum's:

a) Corona radiata b) Zona pellucida c) Vitelline membrane d) Theca externa

Correct answer: b) Zona pellucida. The sperm must penetrate this glycoprotein layer surrounding the oocyte.

23. Fertilization occurs in the:

a) Uterus b) Cervix c) Ampulla of fallopian tube d) Ovary

Correct answer: c) Ampulla of fallopian tube. This is the most common site of fertilization.

24. Zygote is:

a) Haploid b) Diploid c) Triploid d) Asexual

Correct answer: b) Diploid. The zygote contains two sets of chromosomes (one from each parent).

9. Implantation

25. Blastocyst implants in the:

a) Myometrium b) Endometrium c) Perimetrium d) Cervix

Correct answer: b) Endometrium. The blastocyst implants into the uterine endometrium.

26. hCG is secreted by:

a) Corpus luteum b) Pituitary c) Trophoblast d) Endometrium

Correct answer: c) Trophoblast. The developing embryo's trophoblast cells secrete hCG.

27. Implantation occurs ~____ days post-fertilization.

a) 2-3 b) 5-7 c) 10-12 d) 14-16

Correct answer: b) 5-7. Implantation typically occurs about 6 days after fertilization.

10. Gastrulation

28. Primitive streak forms during:

a) Cleavage b) Gastrulation c) Neurulation d) Fertilization

Correct answer: b) Gastrulation. The primitive streak appears during gastrulation in the embryonic disc.

29. Ectoderm gives rise to:

a) Heart b) Nervous system c) Liver d) Kidneys

Correct answer: b) Nervous system. The ectoderm forms the nervous system and epidermis.

30. Mesoderm forms:

a) Skin b) Muscles c) Lungs d) Pancreas

Correct answer: b) Muscles. The mesoderm gives rise to muscles, bones, and the circulatory system.

11. Parturition

31. Oxytocin acts on the:

a) Ovary b) Uterus c) Fallopian tube d) Cervix

Correct answer: b) Uterus. Oxytocin stimulates uterine contractions during labor.

32. Relaxin helps in:

a) Milk production b) Cervical dilation c) Ovulation d) Fertilization

Correct answer: b) Cervical dilation. Relaxin softens the cervix and relaxes pelvic ligaments.

33. Fetal cortisol initiates:

a) Implantation b) Placental formation c) Labor d) Gastrulation

Correct answer: c) Labor. Fetal cortisol triggers changes that initiate the labor process.