Q.28. - Biology

Question

Describe one direct action of growth hormone (GH). 

Step-by-Step Solution

Answer

The generation of GH-induced somatomedin C or insulin-like growth factor is necessary for the majority of GH's effects (IGF). vi. IGF has a significantly longer plasma half-life than GH. The hormone's actions can be generally divided into two categories: a. activity that indirectly encourages growth b. Direct insulin-blocking effect

Step 1: Introduction

The anterior lobe of the pituitary gland secretes growth hormone (GH), also known as somatotropin or human growth hormone. It promotes the development of virtually every tissue in the body, including bone. Somatotrophs, anterior pituitary cells, produce and secrete GH. 

Step 2: Explanation

• Human growth hormone triggers growth in nearly every tissue and organ of the body. 
• However, it especially enables the growth-promoting effect on cartilage and bone, in the adolescent years during puberty. 
• Cartilage cells called chondrocytes and bone cells called osteoblasts receive signals from HGH to raise replication and thus allow for growth in size.
• Once the growth plates in a child’s bones have fused, HGH no longer increases height. 
• Instead, HGH helps to maintain normal body structure throughout the rest of life.