Brown adipose tissue is also known as

Options

A. Unilocular adipose tissue
B. Multilocular adipose tissue
C. Both (1) and (2)
D. Yellow bone marrow

Answer

### Step-by-Step Solution:

1. **Understanding Brown Adipose Tissue**: Brown adipose tissue (BAT) is a type of fat tissue that is primarily involved in thermogenesis (heat production). It is different from white adipose tissue, which primarily stores energy.

2. **Characteristics of Brown Adipose Tissue**: The cells of brown adipose tissue are characterized by the presence of numerous small fat droplets and a large amount of cytoplasm. This structure allows for efficient heat generation.

3. **Multilocular Structure**: The small fat droplets in brown adipose tissue are referred to as "multilocular," meaning that the fat is stored in multiple small compartments within the cells, as opposed to one large droplet found in white adipose tissue.

4. **Mitochondria Presence**: Brown adipose tissue contains a high number of mitochondria, which are the energy-producing organelles in cells. The presence of these mitochondria is what allows brown fat to generate heat effectively.

5. **Coloration**: The brown color of this tissue is due to the high concentration of iron-containing cytochrome pigments found in the mitochondria.

6. **Location**: Brown adipose tissue is primarily found in newborns and hibernating mammals, where it plays a crucial role in maintaining body temperature.

7. **Conclusion**: Given the characteristics of brown adipose tissue, it is also known as "multilocular adipose tissue" due to its structure of having multiple small fat droplets.

### Final Answer:
Brown adipose tissue is also known as **multilocular adipose tissue**.

---