Question

Выясните, что такое «бурый жир», его роль в жизни животных. В ка- кие периоды он появляется у человека? (помогите пожалуйста)​

Answer 1

Объяснение:

Бу́рая жирова́я ткань — один из двух видов жировой ткани у млекопитающих. Бурый жир хорошо развит у новорождённых и у животных, впадающих в спячку. У взрослого человека бурая жировая ткань присутствует и метаболически активна, однако она регрессирует с возрастом.

Answer 2

What is "brown fat" and its role in animal life?

Brown fat, also known as brown adipose tissue (BAT), is a specialized type of fat found in mammals, including humans. Unlike white fat, which stores energy, brown fat is primarily responsible for generating heat through a process called thermogenesis. Brown fat contains a higher number of mitochondria, which are the powerhouses of cells responsible for producing energy. These mitochondria give brown fat its characteristic brown color.

The main role of brown fat is to regulate body temperature and maintain energy balance. It plays a crucial role in newborns and hibernating animals, as they rely on brown fat to generate heat and survive in cold environments. Brown fat is particularly abundant in newborns because they have a higher surface area-to-body mass ratio, making them more susceptible to heat loss. By generating heat, brown fat helps to keep newborns warm.

In addition to its role in thermogenesis, brown fat has also been found to play a role in metabolism and energy expenditure. It has been suggested that increasing the activity of brown fat could potentially help with weight management and metabolic disorders such as obesity and diabetes. However, more research is needed to fully understand the potential therapeutic applications of brown fat activation in humans.

When does brown fat appear in humans?

Brown fat is most abundant in newborns and gradually decreases with age. In humans, brown fat is typically present in higher amounts during infancy and early childhood. As we grow older, the amount of brown fat decreases, and it is mostly found in small deposits in specific areas of the body, such as the neck, upper back, and around major blood vessels.

Recent studies have shown that adults can still have small amounts of active brown fat, especially in response to cold exposure or certain hormonal stimuli. However, the overall amount and activity of brown fat in adults are significantly lower compared to infants and children.

In summary, brown fat is a specialized type of fat that plays a crucial role in thermogenesis and energy balance. It is most abundant in newborns and gradually decreases with age in humans. While brown fat activation has potential implications for weight management and metabolic disorders, further research is needed to fully understand its therapeutic applications in humans.