What role does ghrelin play in the body?

• A. Increases metabolism
• B. Regulates sleep patterns
• C. Stimulates appetite
• D. Reduces fat storage

Answer: (C)

Ghrelin is a hormone produced primarily in the stomach, and its primary role is to stimulate appetite. When the stomach is empty, levels of ghrelin increase, signaling to the brain that it is time to eat. This function is crucial for regulating energy balance and body weight, as ghrelin prompts feelings of hunger and encourages food intake.

In addition to appetite stimulation, ghrelin may also have other effects on the body, such as influencing the release of growth hormone and potentially playing a role in metabolic processes. However, its most recognized function is its direct impact on appetite regulation, making it essential for understanding how the body controls food intake and energy expenditure.