Biology

Human Reproductive System

786 Questions

The human reproductive system covers the anatomy of reproductive organs, gamete production, fertilization processes, and reproductive technologies. This is a highly scoring area in biology sections of competitive exams. Use these questions to practice key concepts.

Fertilization processGamete productionReproductive organ functionsAssisted reproductive technology

Human Reproductive System Questions

Multiple choice

How much should the temperature be in the scrotum for sperm formation?

  1. Slightly higher than the body temperature

  2. Lower than the body temperature

  3. Much higher than the body temperature

  4. Equal to the body temperature

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The formation of germ cells or sperms takes place in the testes. These are located outside the abdominal cavity in scrotum because sperm formation requires a lower temperature than the normal body temperature.

Multiple choice

Ovum is fertilised in

  1. Vagina

  2. Uterus

  3. Fallopian tube

  4. Ovary

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

sperm fuse with ovum in fallopian tube to form a zygote

Multiple choice

At which stage of development is ovum released from ovaries?

  1. Primary oocyte

  2. Secondary oocyte

  3. Tertiary oocyte

  4. Zygote

  5. Quaternary stage
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The tertiary follicle changes into the mature follicle or Graafian follicle. The secondary oocyte forms a new membrane called zona pellucida surrounding it. The Graafian follicle now ruptures to release the secondary oocyte (ovum) from the ovary by the process called ovulation.

Multiple choice

Oocyte is liberated from ovary under the influence of LH completing

  1. meiosis and before liberating polar bodies

  2. meiosis I and before liberating polar bodies

  3. meiosis I and before the completion of meiosis II

  4. meiosis I and after the release of polar body
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oocyte is liberated from ovary under the influence of LH completing meiosis I and before the completion of meiosis II.

Multiple choice

Which of the following structures neutralizes the acidity caused due to the drops of urine in the urethra?

  1. Ejaculatory ducts

  2. Urethra

  3. Prostate gland

  4. Bulbourethral glands

  5. Seminal vesicles
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

These are pea-sized structures located on the sides of the urethra . These glands produce transparent, slippery fluid that serves to lubricate the urethra and to neutralize the acidity being present due to the drops of urine in the urethra.

Multiple choice

Which of the following can cause hirsutism?

  1. pituitary hypersecretion

  2. ovarian tumors

  3. adrenal tumors

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hirsutism is often caused by hormonal imbalances, which can stem from pituitary, ovarian, or adrenal issues. All of these glands can produce hormones that stimulate excess hair growth.

Multiple choice

Hirsutism that has no identifiable cause is called:

  1. Iatric hirsutism

  2. Hereditary hirsutism

  3. Idiopathic hirsutism

  4. Familial hirsutism
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Idiopathic hirsutism refers to excess hair growth where no specific underlying cause, such as hormonal imbalance or medication, can be identified. The prefix 'idio-' implies a condition of unknown origin.

Multiple choice

Hirsutism resulting from certain medications:

  1. Iatric Hirsutism

  2. Familial Hirsutism

  3. Idiopathic Hirsutism

  4. Hereditary Hirsutism
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Iatric hirsutism refers to hair growth caused by medical treatment or medications. The term 'iatric' is derived from the Greek word for physician or healing.

Multiple choice biology reproduction in humans twins reproduction and modern technology post fertilization events

Identical twins will be produced, when

  1. One spermatozoan fertilizes two ova.

  2. One ovum is fertilized by two spermatozoa.

  3. Two eggs are fertilized.

  4. One fertilized egg divides into two blastomeres and they become separate.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

One fertilized egg (ovum) splits and develops two babies with exactly the same genetic information. They are known as identical twins. In this case, one fertilized egg divides into blastomeres and they become separate. The self-contained halves then develop into two babies, with exactly the same genetic information. 

Multiple choice biology reproduction in humans twins reproduction and modern technology post fertilization events

Fraternal twins in humans are produced when

  1. Two sperms fertilize an ovum and the first two blastomeres separate from each other

  2. One sperm fertilizes an ovum and the first two blastomeres separate from each other

  3. Egg develop parthenogenetically and first two blastomeres separate from each other

  4. Two ova are fertilized simultaneously
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fraternal twins are also called as 'dizygotic'. This means there is fertilization of two seperate eggs(ova) by two individual sperms simultaneously. They are implanted in the uterine wall at the same time. They usually develop in two separate amniotic sacs. They are also called as 'biovular' since two eggs form two zygotes.
So, the correct is answer is 'Two ova are fertilized simultaneously'.

Multiple choice biology for the continuity of generation reproductive systems different stages of growth reproductive system in humans

Consider the following three statements related to the human male reproductive system and select the correct option stating which ones are true (T) and which ones are false (F).


(i) The middle piece of spermatozoon is also termed as the powerhouse of the spermatozoon.
(ii) Vas deferens joins a duct from the seminal vesicle and forms vasa efferentia.
(iii) Semen is a collection of secretions from the seminal vesicles, prostate gland and Cowper's glands and sperms from testes.

  1. (i) - T, (ii) - F, (iii) - T

  2. (i) - F, (ii) - F, (iii) - T

  3. (i) - T, (ii) - T, (iii) - F

  4. (i) - F, (ii) - T, (iii) - T
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement (i) is true as the middle piece contains mitochondria (powerhouse). Statement (ii) is false because the vas deferens joins the seminal vesicle duct to form the ejaculatory duct, not vasa efferentia. Statement (iii) is true as semen is a mixture of fluids from these glands and sperm.

Multiple choice biology for the continuity of generation reproductive systems different stages of growth reproductive system in humans

________ produces sperm cells.

  1. Seminal vesicle

  2. Urinary bladder

  3. Testes

  4. Cowper's gland
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The testes are the primary male reproductive organs responsible for the production of both sperm cells and testosterone. Seminal vesicles, the urinary bladder, and Cowper's glands secrete seminal fluid or store urine, but do not produce sperm.