During bone growth, which hormone produced by the reproductive system plays a significant role in the closure of the epiphyseal plates?

• A. Testosterone
• B. Estrogen
• C. Progesterone
• D. Oxytocin

Answer: (B)

Verified step by step guidance

1. Understand the role of the epiphyseal plates: These are areas of cartilage located at the ends of long bones where bone growth occurs during childhood and adolescence. The closure of these plates marks the end of bone growth.
2. Learn about the hormones involved in bone growth: Hormones such as estrogen, testosterone, and growth hormone influence the activity of the epiphyseal plates.
3. Focus on estrogen's role: Estrogen is a hormone produced by the reproductive system that accelerates the maturation and eventual closure of the epiphyseal plates during puberty. This process is more pronounced in females, leading to earlier cessation of growth compared to males.
4. Compare the other hormones listed: Testosterone also influences bone growth but does not play as significant a role in the closure of the epiphyseal plates. Progesterone and oxytocin are not directly involved in this process.
5. Conclude that estrogen is the correct answer: Based on its critical role in the closure of the epiphyseal plates during puberty, estrogen is the hormone produced by the reproductive system that plays a significant role in this process.