Senses, Endocrine, Blood, Heart, and Reproductive System Practice Test

Growth hormone drives growth and primes the body for tissue development by stimulating IGF-1 production, especially in the liver, which promotes bone and soft-tissue growth. Metabolically, it raises blood glucose by opposing insulin actions and boosting hepatic glucose production, while also promoting lipolysis for energy. The other hormones don’t fit this dual role: prolactin mainly supports lactation; TSH increases thyroid hormone and overall metabolism but isn’t a primary growth hormone; ACTH raises cortisol, which can raise glucose but is not growth-promoting.