Introduction to the Male Reproductive System

Q.

Draw a labelled diagram of male reproductive system.

Q.

What is the role of the seminal vesicles and the prostate gland?

Q. In a male, the total number of seminiferous tubules in both testicles are 1500. The most likely combination of testicular lobules and seminiferous tubules per lobule will be:

1. Testicular lobules-250, seminiferous tubules per lobule-3
2. Testicular lobules-350, seminiferous tubules per lobule-5
3. Testicular lobules-200, seminiferous tubules per lobule-4
4. Testicular lobules-220, seminiferous tubules per lobule-3

Q. Read the following statements and find out the incorrect statement.

A. Each testicular lobule contains one to three highly coiled seminiferous tubules in which sperm are produced
B. Each seminiferous tubule is lined on its inside by two types of cells called Leydig cells and Sertoli cells
C. The region outside the seminiferous tubules called interstitial space, contain small blood vessels and male germ cells (spermatogonia) which lead to sperm formation
D. In testis immunologically component cells are also present
E. The seminiferous tubules of the testis open into the rete testis through vasa efferentia

1. B and C
2. B and D
3. D and E
4. B, C and E

Q.

Describe in brief the functions of the following parts in the human male reproductive system:

(i) Testes

(ii) Seminal vesicle

(iii) Vas deferens

(iv) Urethra

Q. Read the following statements and choose the correct option based on the cells and the function associated with them in humans.
Statement 1: The primary spermatocytes undergo meiosis to form spermatozoa.
Statement 2: Interstitial cells or Leydig’s cells provide nutrition to the spermatogenic cells.

1. Both the statements are true
2. Statement 1 is true but statement 2 is false
3. Statement 1 is false and statement 2 is true
4. Both the statements are false.

Q. Choose the correct order of arrangement of male accessory ducts in the reproductive system of human beings:

1. rete testis $\to$ vasa efferentia $\to$ epididymis $\to$ vas deferens
2. rete testis $\to$ vas deferens $\to$ epididymis $\to$ vasa efferentia
3. vas deferens $\to$ rete testis $\to$ vasa efferentia $\to$ epididymis
4. vas deferens $\to$ rete testis $\to$ epididymis $\to$ vasa efferentia

Q. Which of the following cells provide nourishment to the sperms?

1. Leydig cells
2. Interstitial cells
3. Sertoli cells
4. All of the above

Q.

State the functions of testes.

Q. Starting from the maximum, arrange the following male reproductive accessory organs in the correct order, based on the amount of secretion poured into the urethra.
(i) Prostrate gland
(ii) Seminal vesicle
(iii) Bulbourethral gland

1. (i) > (ii) > (iii)
   

2. (iii) > (ii) > (i)

3. (ii) > (iii) > (i)

4. (ii) > (i) > (iii)

Q. Which of these is absent in human sperm?

1. Nucleus
2. Mitochondria
3. Centriole
4. Endoplasmic reticulum

Q. Select the option that correctly matches with the part labelled as A, B, C and D representing the parts of the male reproductive system.

1. A - Ureter
   B - Seminal vesicle
   C - Prostate
   D - Bulbourethral gland
2. A - Ureter
   B - Prostate
   C - Seminal vesicle
   D - Bulbourethral gland
3. A - Vas deferens
   B - Seminal vesicle
   C – Prostate
   D - Bulbourethral gland
4. A - Vas deferens
   B - Seminal vesicle
   C - Bulbourethral gland
   D - Prostate

Q. Identify A, B and C in the given human sperm diagram.

1. A-Acrosome, B-Plasma membrane, C-Mitochondria
2. A-Plasma membrane, B-Acrosome, C-Mitochondria
3. A- Plasma membrane, B-Mitochondria, C-Acrosome
4. A-Mitochondria, B-Plasma membrane, C-Acrosome

Q.

The purpose of testes being situated outside the abdominal cavity in the scrotum is -

1. To make testes less responsive to estrogen.

2. Because the abdominal cavity is too cramped up for the growth of testes.

3. To avoid testes getting crushed or damaged by other organs.

4. To maintain the scrotal temperature lower than the internal body temperature

Q. Label the following parts.

1. 1. Vasa efferentia, 2. Epididymis, 3. Testis, 4. Vas deferens, 5. Urinary bladder, 6. Sperm duct
2. 1. Penis, 2. Vasa efferentia, 3. Rete testis, 4. Prostate, 5. Kidney, 6. Vas deferens
3. 1. Penis, 2. Urethra, 3. Scrotum, 4. Testis, 5. Urinary bladder, 6. Vas deferens
4. 1. Epididymis, 2. Vas deferens, 3. Rete testis, 4. Testis, 5. Urethra, 6. Penis

Q.

Explain in detail about the female reproductive system

Q. The head of mature mammalian sperm consists of:

1. acrosome only.
2. elongated nucleus covered by acrosome.
3. two centrioles.
4. nucleus, acrosome, centrioles and mitochondria.

Q. Choose the correct order of arrangement of male accessory ducts in the reproductive system of human beings:

1. rete testis $\to$ vasa efferentia $\to$ epididymis $\to$ vas deferens
2. rete testis $\to$ vas deferens $\to$ epididymis $\to$ vasa efferentia
3. vas deferens $\to$ rete testis $\to$ vasa efferentia $\to$ epididymis
4. vas deferens $\to$ rete testis $\to$ epididymis $\to$ vasa efferentia

Q. Which of the following cells provide nourishment to the sperms?

1. Leydig cells
2. Interstitial cells
3. Sertoli cells
4. All of the above.

Q. Which of the following is correct about the path of sperm during ejaculation and the glands involved with the male reproductive system?

1. Vas deferens, testis, urethra, seminal vesicle and prostate gland
2. Testis, vas deferens, seminal vesicle, prostate gland and urethra
3. Urethra, vas deferens, testis, seminal vesicle and prostate gland
4. Seminal vesicle and prostate gland, vas deferens, testis, urethra

Q. State whether the following statements are true or false .
Gametes are usually produced in specialized structures known as gonads.

1. True
2. False

Q. The head of mature mammalian sperm consists of:

1. nucleus, acrosome, centrioles and mitochondria.
2. acrosome only.
3. two centrioles.
4. elongated nucleus covered by acrosome.

Q. Sperms are transported to vas deferens from vasa efferentia through_________.

1. epididymis
2. rete testis
3. urethra
4. ejaculatory duct

Q.

Given below is a diagram depicting the male reproductive system. Match the parts labelled with the description given alongside.

i. The glands add their fluid

ii. Sperm leave the body through urethra

iii. Conveys sperm from the testicle to the urethra

iv. Sperm is stored here

1. 1-iv, 2-i, 3-iii, 4-ii

2. 1-iv, 2-iii, 3-i, 4-ii

3. 1-iii, 2-ii, 3-iv, 4-i

4. 1-ii, 2-iii, 3-iv, 4-i

Q. Identify A, B and C in the given human sperm diagram.

1. A-Acrosome, B-Plasma membrane, C-Mitochondria
2. A-Plasma membrane, B-Acrosome, C-Mitochondria
3. A- Plasma membrane, B-Mitochondria, C-Acrosome
4. A-Mitochondria, B-Plasma membrane, C-Acrosome

Q. The head of mature mammalian sperm consists of:

1. acrosome only.
2. elongated nucleus covered by acrosome.
3. two centrioles.
4. nucleus, acrosome, centrioles and mitochondria.

Q.

Given below is a diagram depicting the male reproductive system. Match the parts labelled with the description given alongside.

i. The glands that add their fluid to the semen

ii. Sperms leave the body through this duct

iii. Conveys sperm from the testicle to the urethra

iv. Sperm is stored here

1. 1-iii, 2-ii, 3-iv, 4-i

2. 1-ii, 2-iii, 3-iv, 4-i

3. 1-iv, 2-iii, 3-i, 4-ii

4. 1-iv, 2-i, 3-iii, 4-ii

Q. Assertion :During fertilization, only head of spermatozoa enters egg. Reason: If several spermatozoa hit the egg at same time, all can enter the egg.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Match the parts with their functions.

1. Sperm production
2. Androgen secretion
3. Sperm nutrition
4. Protects testes

Q. Testosterone is secreted by the :

1. Sertoli cells
2. Leydig's cells
3. Prostate gland
4. Pituitary gland