Tag: the reproductive system

Questions Related to the reproductive system

Sertoli cells are involved in

biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

  1. Excretion

  2. Respiration

  3. Nutrition and morphogenesis of sperms

  4. All of the above

Show answer
Correct Option: C
Explanation:

Sertoli cells or nurse cells which are a part of seminiferous tubules helps in process of spermatogenesis or production of sperms, nutrition, and morphogenesis of sperms.

So the correct option is 'Nutrition and morphogenesis of sperms.'

The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is :

biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

  1. Spermatogonia-spermatid-spermatocyte- sperms

  2. Spermatocyte-spermatogonia-spermatid- sperms

  3. Spermatogonia-spermatocyte-spermatid- sperms

  4. Spermatid-spermatocyte-spermatogonia- sperms

Show answer
Correct Option: C

Which among the following is not the function of testes at puberty?
(i) Formation of germ cells
(ii) Secretion of testosterone
(iii) Development of placenta
(iv) Secretion of estrogen

biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

  1. (i) and (ii)

  2. (ii) and (iii)

  3. (iii) and (iv)

  4. (i) and (iv)

Show answer
Correct Option: C
Explanation:

Gonads have a dual function, production of hormones and gametes. In the male, testes produce sperms and testosterone. 

Placenta develops in females during pregnancy. It has a number of functions, like the production of hormones, nutrition, excretion etc. Estrogen is a female hormone produced by the ovaries (female gonads). Thus, the correct answer is option C.

Which gland is responsible for the secondary sexual characters in boys?

biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

  1. Ovary

  2. Pancreas

  3. Adrenal gland

  4. Testis

Show answer
Correct Option: D
Explanation:

Testes are the primary reproductive organs which produce sperms and hormone known as testosterone. This hormone is important for sexual development and puberty i.e., development of secondary sexual characteristics like facial hair, sexual behaviour etc.
The ovary is the female reproductive organ which produces the mature ovum which further fuses with sperm to form a zygote. 
Pancreas is a heterocrine gland which secretes insulin, glucagon and somatostatin as endocrine and pancreatic juice an exocrine gland.
Adrenal are endocrine glands, which secretes various cortisol.
Thus, the correct answer is option D.

Which of the following organ is involved in production of sperm?

biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

  1. Ovary

  2. Testis

  3. Vagina

  4. None of these

Show answer
Correct Option: B
Explanation:

The testes are a pair of primary male reproductive organ. The testes are responsible for the production of sperm cells and the male sex hormone, testosterone.
Thus, the correct answer is option A.

Which of the following age is the limit for sperm production in males?

biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

  1. 30-35 years

  2. 40-45 years

  3. 45-50 years

  4. None of these

Show answer
Correct Option: D
Explanation:

As and when the body ages, both male and female experience changes in their body gradually. These changes are not only in ageing but also in their reproductive systems. Females, start producing eggs (female gamete) once they start menstruating at the age of 12-15 and seizes to produce at the age of around 40. This phase is called menopause in females. In contrast, there is no such thing as andropause in males reported by WHO. Production of sperms may reduce or halt in a man due to the reduced secretion of testosterone or decrease in Leydig cells. But a healthy man will continue in sperm production throughout his lifetime. So, the correct answer is option D.

Human males produce which of the following hormones?

biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

  1. Testosterone

  2. Luteinizing hormone

  3. Follicle stimulating hormone

  4. All of the above

Show answer
Correct Option: D
Explanation:

Important male reproductive hormones are FSH, LH, and testosterone.

FSH is important for the production of sperm. 
LH stimulates testosterone production.
Testosterone is produced by cells of Leydig and important for the development of male secondary sexual characteristics, spermatogenesis. 
So, the correct answer is option D.

State the following statement is true or false.

Spermatozoa get nutrition from Sertoli cells.

biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

Sertoli cells are supportive, nutritive cells that secrete a polypeptide hormone which is known as inhibin.

These are found in the testis of males which help in providing nutrition to the growing spermatozoa, therefore, they are also known as nurse cells.
The spermatozoa, once they are divided from the sperm mother cell, remain embedded in the Sertoli cells by their heads to get nutrition.
So, the correct option is 'True'.

The testes of a great majority of mammals are typically enclosed in an extra abdominal sac, the scrotum. The temperature inside the scrotum is lower than that in the abdomen. What will happen if the temperature of the scrotum is artificially maintained to the level of abdominal temperature?

biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

  1. The germinal epithelium will produce a large quantity of androgen secretion.

  2. The germinal epithelium of the testes will divide faster, thus producing more sperms.

  3. The germinal epithelium of the testes will degenerate, resulting in sterility.

  4. The germinal epithelium will carry out normal spermatogenesis.

Show answer
Correct Option: C
Explanation:
  • The temperature of the scrotum is maintained at 2 degree celsius less than the normal body temperature.
  • Spermatogenesis requires this lower temperature.
  • This temperature of the scrotum is important for the production of viable sperm. 
  • If the temperature increases it will lead to the decrease in viable sperms causing sterility.

Consider the following four statements (A-D) and select the option which includes all the correct ones 

A)  The male sex accessory ducts. Include rete testis, vasa efferentia, epididymis and vas deferens.

B)   Leydig cells synthesize and secrete testicular hormones called androgen.

C)   The male reproductive system is located in the pelvic region.

D)   Each testis has about 250 compartments called testicular lobules.

biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

  1. $A, B, C, D$

  2. $B,C,D$

  3. $A,B,C $

  4. $A$ and $B$

Show answer
Correct Option: A
Explanation:

The male reproductive is located in the pelvic region. It includes a pair of testes along with a pair of accessory ducts, glands and external genitalia. Each testis has  250 compartment called testicular lobules. Each lobule contains one to three highly coiled seminiferous tubules in which sperms are produced. The regions outside the seminiferous tubules called interstitial spaces contain small blood vessels called and Leydig cells. Leydig cells secrete a testicular hormone called androgens. The male sex accessory ducts include rete testis, vasa efferentia, epididymis and vas deferens.

So, the correct answer is ' All the statements are correct '