Q.Draw a labelled diagram of Transverse section of Human testis. OR Draw a labelled diagram of longitudinal section of a typical flower.

Showing the 12 most recent of 39 on this concept.

1. CBSE 2026Set V11 markMCQ
   Q.The cells that secrete androgens are

   (a) Sertoli cells

   (b) Leydig cells

   (c) Germ cells

   (d) Spermatogonia

   ›Reveal solutionSolution

   The interstitial Leydig cells of the testis secrete androgens.

   In the testis, the Leydig cells (interstitial cells) lie in the spaces between the seminiferous tubules and synthesise and secrete the male sex hormones called androgens (mainly testosterone). Sertoli cells nourish the de …

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2. CBSE 2026Set A1 markMCQ
   Q.Which of the following cells are found in seminiferous tubules?

   (a) Sertoli cells

   (b) Interstitial cells

   (c) Spermatogonia

   (d) Both (A) and (C)

   ›Reveal solutionSolution

   Inside the seminiferous tubules are spermatogonia (germ cells) and Sertoli (nurse) cells; interstitial (Leydig) cells lie outside the tubules.

   The lining of each seminiferous tubule is made of two types of cells: the male germ cells or spermatogonia, which undergo meiosis to form sperm, and the Sertoli cells (nurse cells), which provide nourishment to the developing germ cells. The interstitial cells (Leydig cells), which secrete testosterone, are lo …

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3. CBSE 2026Set A1 markMCQ
   Q.In which structure of sperm are the enzymes present which help in fertilisation of the ovum?

   (a) Middle piece

   (b) Neck

   (c) Nucleus

   (d) Acrosome

   ›Reveal solutionSolution

   The acrosome, a cap over the sperm head, holds enzymes that help the sperm enter the egg.

   The head of a sperm is covered by a cap-like structure called the acrosome. It is filled with hydrolytic enzymes (such as hyaluronidase) that digest and break down the outer coverings of the ovum (the zona pellucida), allowing the sperm to penetrate and fertilise the egg. The middle piece contains mit …

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4. CBSE 2026Set ANNUAL1 markMCQ
   Q.Acrosome is found in which part of the human sperm?

   (a) Tail

   (b) Middle piece

   (c) Head

   (d) Neck

   ›Reveal solutionSolution

   The acrosome is an enzyme-filled cap over the sperm's head that helps the sperm penetrate the egg's outer coverings.

   A human sperm has a head, neck, middle piece and tail. The head contains an elongated, haploid nucleus, the anterior portion of which is covered by a cap-like structure called the acrosome, filled with enzymes (such as hyaluronidase) that facilitate fertilisation by digesting t …

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5. CBSE 2026Set ANNUAL1 markMCQ
   Q.Which of the following is not a part of male reproductive system?

   (a) Ampulla

   (b) Prostate

   (c) Foreskin

   (d) Bulbourethral gland

   ›Reveal solutionSolution

   Prostate, bulbourethral (Cowper's) glands and the foreskin are all male reproductive structures; the ampulla belongs to the female oviduct.

   In the male reproductive system, the accessory glands (prostate, seminal vesicles, bulbourethral glands) add secretions to semen, and the foreskin (prepuce) covers the glans penis. The ampulla, by contrast, is the wide distal part of the female fall …

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6. CBSE 2026Set ANNUAL1 markMCQ
   Q.Leydig cells are found :

   (a) in liver

   (b) in testes

   (c) in kidney

   (d) in uterus

   ›Reveal solutionSolution

   Leydig cells (interstitial cells) are found in the testes, between the seminiferous tubules.

   Inside the testis, in the interstitial spaces between the seminiferous tubules, are small clusters of glandular cells called Leydig cells (interstitial cells). They are steroidogenic cells that synthesise and secrete the male sex hormone testosterone (androgen), which controls the development of secondary sexual characters in males …

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7. CBSE 2026Set ANNUAL1 mark
   Q.In which part of the body is the male reproductive system located?

   ›Reveal solutionSolution

   The human male reproductive system is located in the pelvic region.

   Concept: The male reproductive system comprises the testes, accessory ducts (rete testis, vasa efferentia, epididymis, vas deferens), accessory glands and the external genitalia. …

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8. CBSE 2026Set ANNUAL1 markMCQ
   Q.The testes in humans are located outside the abdominal cavity within a pouch called the scrotum. This positioning helps in :

   (a) avoiding compression by internal organs.

   (b) maintaining a temperature slightly lower than the body temperature for sperm formation.

   (c) protecting the testes from physical injury during movement.

   (d) helping in the storage of urine before excretion.

   ›Reveal solutionSolution

   The scrotum keeps the testes cooler than the body core, and this lower temperature is required for sperm production, so (b) is correct.

   In the CBSE/NCERT Human Reproduction chapter, the testes lie outside the abdomen in the scrotum. Spermatogenesis (sperm formation) proceeds normally only at a temperature 2-2.5°C below core body temperature. The scrotal sac provides exactly this cooler environment. If the testes are retained inside the abdomen (cryptorchidism), the higher temperature impairs sperm formatio …

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9. CBSE 2025Set 57/4/11 markMCQ
   Q.Given below are a few statements with reference to the accessory ducts of the human male reproductive system :

   (i) The seminiferous tubules of the testes open into rete testis then into the vas deferens.

   (ii) The vasa efferentia leave the testes and open into the epididymis.

   (iii) The epididymis leads to vas deferens that ascends into the abdomen.

   (iv) The vas deferens receives a duct from the prostrate gland and opens into the urethra as ejaculatory duct.

   (v) The urethra originates from the urinary bladder and extends through the penis to its external opening, urethral meatus. Choose the option with all true statements from the given options : (A) (i), (ii),

   (iv) (B) (ii), (iii),

   (v) (C) (ii), (iv),

   (v) (D) (i), (iii), (iv)

   ›Reveal solutionSolution

   This question tests knowledge of the correct sequence and connections of the accessory ducts in the human male reproductive system. Statements (ii), (iii), and (v) accurately describe these ducts, making option (B) the correct choice.

   Concept and Intuition

   The male reproductive system includes a network of accessory ducts that play a crucial role in the transport, storage, and maturation of sperm. Understanding the precise pathway sperm take from their production site in the testes to their exit from the body is key. This pathway involves a series of interconnected tubes, each with a specific function and anatomical location. Any deviation from this correct sequence or connection makes a statement false.

   1. Evaluate Statement (i): "The seminiferous tubules of the testes open into rete testis then into the vas deferens."

      • Sperm are produced in the seminiferous tubules within the testes. From there, they move into the rete testis, a network of tubules. This part of the statement is correct.
      • However, from the rete testis, sperm do not directly enter the vas deferens. Instead, they pass through several small ducts called the vasa efferentia, which then lead into the epididymis. Only after passing through the epididymis does the duct continue as the vas deferens.
      • Therefore, this statement is false because it omits the vasa efferentia and epididymis in the sequence.

   2. Evaluate Statement (ii): "The vasa efferentia leave the testes and open into the epididymis."

      • Following the rete testis, the vasa efferentia (also called efferent ductules) are indeed the ducts that emerge from the testes and transport sperm to the epididymis. The epididymis is a highly coiled tube located on the posterior surface of each testis, where sperm mature and are stored.
      • This statement accurately describes the anatomical connection.
      • Therefore, this statement is true.

   3. Evaluate Statement (iii): "The epididymis leads to vas deferens that ascends into the abdomen."

      • The tail of the epididymis is continuous with the vas deferens (also known as the ductus deferens). The vas deferens is a muscular tube that ascends from the scrotum into the abdominal cavity, looping over the urinary bladder. It is a major component of the spermatic cord.
      • This statement correctly describes the continuation of the epididymis and the path of the vas deferens.
      • Therefore, this statement is true.

   4. Evaluate Statement (iv): "The vas deferens receives a duct from the prostrate gland and opens into the urethra as ejaculatory duct." …

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10. CBSE 2025Set ANNUAL1 markMCQ
    Q.Sertoli cells are present in :

    (a) Kidney

    (b) Testis

    (c) Liver

    (d) Ovary

    ›Reveal solutionSolution

    Sertoli cells occur in the seminiferous tubules of the testis.

    Sertoli cells (nurse cells) line the walls of the seminiferous tubules inside the testis. They provide nutrition to the developing germ cells during spermatogenesis, secrete the hormone inhibin (which regulates FSH secretion through negative feedback), …

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11. CBSE 2025Set F1 markMCQ
    Q.Which of the following human cells is motile?

    (a) Nerve cell

    (b) Cutaneous cell

    (c) Egg cell

    (d) Sperm cell

    ›Reveal solutionSolution

    The sperm is the motile human cell.

    The human sperm (spermatozoon) has a head, middle piece and a long tail (flagellum) whose lashing movements propel it through the female reproductive tract toward the egg, so it is a motile cell. Nerve cells, skin (cutaneous) cells and the ovum (egg) are non- …

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12. CBSE 2025Set F1 markMCQ
    Q.From which of the following do developing sperms get nutrition?

    (a) Sertoli cells

    (b) Germinal epithilium

    (c) Blood cell

    (d) Leydig cell

    ›Reveal solutionSolution

    Developing sperms are nourished by Sertoli (nurse) cells inside the seminiferous tubules.

    Inside the seminiferous tubules of the testis there are two important cell types:

    • Sertoli cells (nurse cells) — attached to the germinal epithelium; they provide nutrition and support to the developing germ cells/spermatids during spermatogenesis. …

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