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NEET UG Life Processes in Living Organisms Part 2 — practice questions

Explore 15 free Life Processes in Living Organisms Part 2 questions in NEET UG Science. Open each question or exercise to read its content, reference answers and available explanation.

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Life Processes in Living Organisms Part 2 questions and exercises with answers

Showing questions 1–15 of 15.

Each testis is divided into approximately how many compartments called testicular lobules?Read the answer and worked solution →Each seminiferous tubule is lined on its inside by two types of cells:Read the answer and worked solution →Leydig cells (interstitial cells) of the testis are responsible for:Read the answer and worked solution →The secretions constituting seminal plasma are rich in all of the following EXCEPT:Read the answer and worked solution →The enlarged end of the penis covered by a loose fold of skin (foreskin) is called the:Read the answer and worked solution →The primary female sex organs that produce ovum and steroid hormones are the:Read the answer and worked solution →The finger-like projections at the edge of the infundibulum (fallopian tube), which help in collection of the ovum after ovulation, are called:Read the answer and worked solution →The part of the fallopian tube where fertilisation typically takes place is the:Read the answer and worked solution →The female external genitalia (vulva) include all of the following EXCEPT:Read the answer and worked solution →The glandular tissue of each breast is divided into approximately how many mammary lobes containing alveoli?Read the answer and worked solution →In males, LH acts on which cells to stimulate androgen secretion?Read the answer and worked solution →In males, FSH acts on which cells?Read the answer and worked solution →The transformation of spermatids into spermatozoa is called:Read the answer and worked solution →After spermiogenesis, the release of mature sperm from the seminiferous tubules is called:Read the answer and worked solution →During each coitus, a human male typically ejaculates approximately:Read the answer and worked solution →

Worked practice questions

Each testis is divided into approximately how many compartments called testicular lobules?

  1. 100
  2. 250
  3. 1000
  4. 50
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Correct answer: B. 250

Each testis contains about **250 testicular lobules**, each housing 1–3 highly coiled seminiferous tubules where sperms are produced.

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Each seminiferous tubule is lined on its inside by two types of cells:

  1. Primary spermatocytes and oocytes
  2. Leydig cells and Sertoli cells
  3. Spermatogonia and Leydig cells
  4. Spermatogonia and Sertoli cells
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Correct answer: D. Spermatogonia and Sertoli cells

Seminiferous tubules are lined by **spermatogonia (male germ cells)** that undergo meiosis to form sperms, and **Sertoli cells** that provide nutrition to the dividing germ cells. Leydig cells are in the *interstitial spaces* outside the tubules.

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Leydig cells (interstitial cells) of the testis are responsible for:

  1. Providing nutrition to germ cells
  2. Producing oxytocin
  3. Producing sperms
  4. Synthesising and secreting androgens (testicular hormones)
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Correct answer: D. Synthesising and secreting androgens (testicular hormones)

**Leydig cells** in the interstitial spaces synthesise and secrete **androgens** (testicular hormones) under LH stimulation. Sertoli cells nourish germ cells spermatogonia divide to form sperms.

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