.webp){kind=small}
Are you struggling to understand the complex processes of human reproduction? Our expertly crafted blog covers 20-25 solved examples that simplify this intricate topic. From gametogenesis and hormonal regulation to fertilization and embryonic development, each example is explained step-by-step for easy comprehension. Perfect for NEET, CBSE, and competitive exam preparation, these solutions are designed to boost your conceptual clarity and exam confidence. Explore our detailed examples and elevate your understanding of human reproduction today!
1. Several mammary ducts join to form a wider mammary ampulla, which is connected to:
A . Lactiferous duct
B . Seminiferous duct
C . Seminiferous tubules
D . Lactiferous canal
Solution:
Several mammary ducts joins to form lactiferous ducts in mammary glands.
Correct Answer : A
2. Absence of menstruation is known as:
A . Dysmenorrhea
B . Ectopic pregnancy
C . Zona pellucida
D . Amenorrhea
Solution:
Absence of menstruation is called amenorrhea.
Correct Answer : D
3. First or free milk is called:
A . Rostrum
B . Colostrum
C . Cholesterol
D . Baby's milk
Solution:
The first milk secreted after childbirth is called colostrum.
Correct Answer : B
4. Menstrual flow occurs due to lack of
A . Progesterone
B . FSH
C . Oxytocin
D . Vasopressin
Solution:
In a natural cycle, menstruation or menstrual flow occurs when the levels of estrogen and progesterone decrease rapidly in case when there is no fertilization and subsequently, no implantation takes place.
Correct Answer : A
5. Milk production starts
A . Towards the end of pregnancy
B . Towards the beginning pregnancy
C . Towards the beginning of puberty
D . Throughout the life cycle
Solution:
Milk production starts towards the end of pregnancy.
Correct Answer : A
6. In a twenty-five-year-old woman with two-month pregnancy, cut section of ovary will show mainly
(i) Primary follicles containing primary oocytes
(ii) Graafian follicle containing secondary oocytes
(iii) Corpus luteum
A . 1 & 2
B . 2 & 3
C . 3 only
D . 1 & 3
Solution:
In pregnancy Graafian follicles do not develop due to low levels of \(\text{FSH}\).
Correct Answer : D
7. Which one of the following is not a male accessory gland?
A . Seminal vesicle
B . Ampulla
C . Prostate
D . Bulbourethral gland
Solution:
Ampulla is a swollen part of vas deferens for temporary storage of sperms.
Correct Answer : B
8. Placenta acts as an
A . Embryo
B . Corpus luteum
C . Exocrine gland
D . Endocrine tissue
Solution:
Apart from being a nourishing medium for the developing foetus, the placenta also acts as an endocrine tissue, producing hormones like human chorionic gonadotropin (hCG), human placental lactogen (hPL), estrogens, progestogens, etc.
Correct Answer : D
9. At the time of birth, the oocyte are in which state:
A . Prophase-I
B . Prophase-II
C . Meiosis-II
D . Mitosis
Solution:
At the time of birth the oocyte remains arrested in prophase I till puberty.
Correct Answer : A
10. Capacitation of sperms occurs in:
A . Vagina
B . Vas efferen
C . Vas deferens
D . Female genital tract
Solution:
Capacitation of sperm takes place in the female genital tract, where the active sites of sperm head are unmasked.
Correct Answer : D
11. Sertoli cells are regulated by a pituitary hormone, known as:
A . LH
B . FSH
C . GH
D . Prolactin
Solution:
Sertoli cells are thus regulated by follicle stimulating hormones
Correct Answer : B
12. Hormone injected by doctors to induce delivery is:
A . Inhibin
B . Oxytocin
C . Oestrogen
D . Prolactin
Solution:
Oxytocin is injected to a patient to induce labor pains.
Correct Answer : B
13. Which of the following stage of oogenesis forms a membrane called zona pellucida surrounding it?
A . Oogonia
B . Polar body
C . Corpus luteum
D . Secondary oocytes
Solution:
The zona pellucida is a glycoprotein thick noncellular membrane surrounding the plasma membrane of an oocyte or secondary oocytes.
Correct Answer : D
14. Where do sperms get matured?
A . In seminal vesicle
B . Seminiferous tubule
C . In epididymis
D . Vasa efferentia
Solution:
Sperms get matured in epididymis.
Correct Answer : C
15. Cleavage forms 2-4-6-8-16 cells. These cells are called:
A . Blastocysts
B . Blastomeres
C . Morula
D . Trophoblast
Solution:
Cleavage in zygote results in formation of blastomeres.
Correct Answer : B
16. Which of the following depicts the correct pathway of transport of sperms?
A . Efferent ductules Rete testis Vas deferens Epididymes
B . Rete testis Efferent ductules Epididymes Vas deferens
C . Rete testis Epididymes Efferent ductules Vas deferens
D . Rete testis Vas deferens Efferent ductules Epididymes
Solution:
Rete testis Efferent ductules Epididymes Vas deferens
Correct Answer : B
17. Spermatids are transformed into sperm by a process called _____
A . spermiation
B . implantation
C . insemination
D . spermiogenesis
Solution:
Spermiogenesis is the final stage of spermatogenesis, which involves the maturation of spermatids and its transformation into mature, motile spermatozoa.
Correct Answer : D
18. Compartments in mammalian testes are called:
A . Testicular lobules
B . Seminiferous tubules
C . Rete testis
D . Epididymis
Solution:
Compartments in the mammalian testes are called testicular lobules. Each lobule has 1-3 seminiferous tubules in it.
Correct Answer : A
19. At which stage of the cell cycle, secondary oocyte gets arrested before pregnancy?
A . Anaphase-I
B . Prophase-II
C . Metaphase-II
D . Telophase-I
Solution:
Secondary oocyte remains arrested in metaphase II stage before fertilization.
Correct Answer : C
20. At menopause, there is rise in urinary excretion of:
A . FSH
B . STH
C . TSH
D . MSH
Solution:
It is because FSH and LH can't perform their normal function on ovaries.
Correct Answer : A
Biology Faculty
BDS from PT. B.D. Sharma University of Health Sciences, Rohtak
