Problem 93 - Objective Biology for NEET

Question

Leydig cells or interstitial cells secretes (a) Oestrogens (b) Progesterone (c) Testosterone (d) Relaxin

Step-by-Step Solution

Answer

Therefore, the correct answer is (c) Testosterone.

Step 1: Understanding Leydig cells

Leydig cells, also known as interstitial cells, are found adjacent to the seminiferous tubules in the testicle. They produce testosterone in the presence of luteinizing hormone (LH).

Step 2: Identifying the hormone

From the provided options, it can be seen that oestrogens, progesterone, testosterone and relaxin are the choices. Oestrogens and progesterone are primarily female hormones, while relaxin plays a role in pregnancy. Testosterone, on the other hand, is a male hormone and is also the main hormone produced by Leydig cells.

Key Concepts

Testosterone Production

Testosterone is a pivotal hormone in the male reproductive system. It is primarily produced by Leydig cells in the testes. These cells are found in clusters between the seminiferous tubules and are essential for producing testosterone. The hormone plays a critical role in male development.

• Testosterone is responsible for the development of male secondary sexual characteristics, such as facial hair, deep voice, and muscle growth.
• It also supports spermatogenesis, which is the process of sperm production in the testes.
• This hormone has significant anabolic effects, promoting the growth of tissues and bone density.

Understanding the role of testosterone is crucial for comprehending male physiology and disorders related to its dysfunction.

Luteinizing Hormone (LH)

Luteinizing hormone (LH) is vital in the regulation of the male reproductive system. It is produced by the pituitary gland and plays a key role in stimulating Leydig cells to produce testosterone.

• LH binds to receptors on Leydig cells, prompting them to synthesize testosterone. This process ensures the maintenance of testosterone levels in the blood.
• The regulation of LH is part of the hypothalamic-pituitary-gonadal axis, demonstrating a complex feedback loop that helps maintain endocrine homeostasis.
• In addition to testosterone production, LH also influences the overall function and health of the testes.

Understanding how LH works helps in diagnosing and treating various reproductive health issues.

Male Reproductive System

The male reproductive system is an intricate network of organs and glands that collaborate to produce, maintain, and transport sperm and protective fluid (semen). It also plays a crucial role in producing male hormones like testosterone, which are integral for male health and reproductive tasks.

• The primary organs involved include the testes, which produce sperm and testosterone, and the penis for delivering sperm.
• Accessory structures like the epididymis, vas deferens, and seminal vesicles are essential for the maturation and transport of sperm.
• The prostate gland and bulbourethral glands add fluids that protect and support sperm during ejaculation.

Overall, understanding how these components function collectively provides insight into male reproductive health and its impact on overall well-being.