Unit 5A: Human Reproductive System — Online MCQ Test
ZOOLOGY · CLASS 12 INTERMEDIATE 2 YEAR · Telangana State Board
Practice Unit 5A: Human Reproductive System with a free chapter-wise online MCQ test.
This chapter covers: This chapter covers male female reproductive systems histology of gonads gametogenesis spermatogenesis oogenesis menstrual cycle fertilization embryo development and lactation..
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Unit 5A: Human Reproductive System — Important Questions & Answers
Which hormone is secreted by Leydig cells in the human testes?
- A. Estrogen
- B. Progesterone
- C. Testosterone
- D. Follicle-stimulating hormone
Answer: C. Testosterone
Leydig cells, present in the interstitial spaces of testes, secrete testosterone. It is the principal male sex hormone.
Leydig cells, present in the interstitial spaces of testes, secrete testosterone. It is the principal male sex hormone.
In the human female reproductive system, fertilization normally takes place in the:
- A. Uterus
- B. Cervix
- C. Oviduct
- D. Vagina
Answer: C. Oviduct
Fertilization usually occurs in the ampullary-isthmic junction of the oviduct. This is the most common site where sperm meets ovum.
Fertilization usually occurs in the ampullary-isthmic junction of the oviduct. This is the most common site where sperm meets ovum.
Which of the following is NOT a part of the male reproductive system?
- A. Seminal vesicle
- B. Prostate gland
- C. Vas deferens
- D. Fallopian tube
Answer: D. Fallopian tube
Fallopian tube is a part of the female reproductive system. It transports the ovum from the ovary to the uterus.
Fallopian tube is a part of the female reproductive system. It transports the ovum from the ovary to the uterus.
Which sequence is correct in the path of sperm from its formation to exit from the body?
- A. Seminiferous tubules → Epididymis → Vas deferens → Urethra
- B. Epididymis → Seminiferous tubules → Vas deferens → Urethra
- C. Vas deferens → Seminiferous tubules → Epididymis → Urethra
- D. Seminiferous tubules → Vas deferens → Epididymis → Urethra
Answer: A. Seminiferous tubules → Epididymis → Vas deferens → Urethra
Sperm are formed in seminiferous tubules, mature in the epididymis, pass through vas deferens, and finally exit via the urethra. This is the normal route in males.
Sperm are formed in seminiferous tubules, mature in the epididymis, pass through vas deferens, and finally exit via the urethra. This is the normal route in males.
Which of the following best explains why the human placenta is called a temporary endocrine organ?
- A. It produces digestive enzymes throughout life
- B. It secretes hormones only during pregnancy and is discarded after birth
- C. It stores sperm cells temporarily
- D. It produces red blood cells after birth
Answer: B. It secretes hormones only during pregnancy and is discarded after birth
The placenta functions as an endocrine organ during pregnancy by secreting hormones such as hCG, estrogens, and progesterone. It is temporary because it is expelled after childbirth.
The placenta functions as an endocrine organ during pregnancy by secreting hormones such as hCG, estrogens, and progesterone. It is temporary because it is expelled after childbirth.