Question

Brown fat is specialized adipose tissue with abundant mitochondria and rich blood supply. Brown fat
(a) Insulates animals that are acclimatized to cold
(b) Is the major source of heat production in birds
(c) Provides energy to muscles
(d) Produces heat without producing ATP

Answer 1

Hint: A type of adipose tissue that helps in absorbing a large amount of oxygen that helps in maintaining the body temperature even in extreme climates and helps the animals to survive and helps to keep them warm.

Complete answer:
The brown fat is also known as brown adipose tissue which is similar to white adipose tissue but has few extra capillaries for the blood supply. It absorbs oxygen but releases a large amount of heat in mammals helping them to get acclimatized in a cold climate.
- The adipose tissue is the fat cells that are made up of adipocytes.
- These adipose tissues help in the storage of energy and act as an insulator.
- They are the loose connective tissue.
- Adipose tissue was first observed in 1551 by Swiss naturalist Conrad Gessner.
- It is of two types: white adipose tissue and brown adipose tissue.
- The brown adipose tissue is mostly found in the case of mammals and usually in the early embryonic development.
- The main role of brown fat is to provide thermoregulation.
- They consist of several smaller lipid droplets along with iron- containing mitochondria which are responsible for its brown color.
 - It has many capillaries that supply a large amount of oxygen and nutrients in the body and thus providing heat throughout the body during the cold climate.
So, the correct answer is ‘Insulates animals that are acclimatized to cold’.

Note: Brown fat cells are mesodermal in origin. Thye help in providing strength to the bones and increase bone density. A person can increase their brown fat by surrounding themselves in the lower temperature for at least two hours daily, this can convert their normal white fat into brown fat. These fats have mitochondria which turn the fats and convert them into heat which is released.