Biology

Human Reproductive System

751 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

The biochemical basis of reproduction is __________.

  1. RBC

  2. WBC

  3. neuron

  4. DNA
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

At the cellular level, reproduction refers to the formation of new cells. It can occur, if a new cell gets nucleus and nucleus contains DNA molecules. DNA is the genetic material, which is passed from one generation to another. Thus, for reproduction, DNA material is to be duplicated. Hence, DNA is the biochemical basis of reproduction. On the contrary options (1), (2) and (3), which refer to different cells like RBC, WBC and neuron have no role in the process of reproduction.

Multiple choice

Which of the following statements is false regarding the changes in penis during copulation?

  1. Although the penis is completely refractory to stimulation during the primary stage of the resolution phase, this stage is relatively longer.

  2. Contractions in the urethra, bulbocavernosus and ischiocavernosus muscles promotes ejaculation.

  3. Men cannot usually achieve an erection after spinal cord injuries.

  4. Muscular contractions in the prostate, seminal vesicles and vas deferens drives emission.

  5. During secondary involution, the penis progressively regains responsiveness.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The resolution phase of the male sexual cycle is divided into two parts. During the primary stage of involution, penile detumescence occurs; the penis reduces to 50% of its fully erect state and remains completely refractory to stimulation. This stage is relatively short.

Multiple choice

The vas deferens is important for which of the following functions of spermatogenesis?

  1. It consumes the unneeded portions of the spermatozoa

  2. Sperm transit

  3. Maintaining the blood–testis barrier

  4. Testosterone production

  5. Sperm storage
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Both the epididymis and the vas deferens are made up of ducts which have muscular components. These muscular parts aid in peristalsis, which helps move spermatozoa along the ducts.

Multiple choice

Which of the following is not a function of Sertoli cells?

  1. Aromatization of androgen precursors to estrogen

  2. Maintenance of the blood–testis barrier

  3. Metabolic support of developing spermatozoa

  4. It acts as phagocytes

  5. Maintains the position of primordial germ cells against the basement membrane
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Primordial germ cells are maintained against the basement membrane of the seminiferous tubules; Sertoli cells do not appear to have a role in this process.

Multiple choice

Testes are located in the

  1. vas deferens

  2. prostrate gland

  3. scrotum

  4. penis

  5. seminal vesicle
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Testis is a pair of testes which lies in a skin pouch is called scrotum.

Multiple choice

Secretions of prostrate gland and seminal vesicles help in the

  1. formation of sperm

  2. transport of sperm

  3. provision of nutrition to sperm

  4. Both 1 and 3

  5. 1, 2 and 3

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

The seminal vesicle and prostate glands add their secretions, so that the sperms are in a fluid which makes their transport easier and this fluid also provides nutrition.

Multiple choice

Choose the correct path for fertilisation process.

  1. Cervix → Vagina → Fallopian tube → Uterus

  2. Cervix → Fallopian tube → Vagina → Uterus

  3. Vagina → Cervix → Uterus → Fallopian tube

  4. Vagina → Cervix → Fallopian tube → Uterus

  5. Vagina → Fallopian tube → Uterus → Cervix
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The sperms enter in vagina, cervix, uterus and fallopian tube.