Question

A newborn baby and hibernating mammal has the cold resisting device due to:-

• A. White fat
• B. Fat rich in reticular tissue
• C. Synapse
• D. Brown fat

Answer 1

The correct option is D

Brown fat

The correct option is D:

Explanation of the correct option:

Option D:

1. Brown fat is found in newborn babies and hibernating animals.
2. It is packed with iron-rich mitochondria giving it a brownish colour.
3. It has a greater capacity for generating heat and gets activated when the temperature is low.
4. Thereby, keeping the baby and hibernating animals warm in harsh winters.

Explanation of the incorrect option:

Option A:

1. The main function of white fat is to store lipids and provide resistance to shock.
2. It mainly functions as a shock absorbent.

Option B:

Fat rich in reticular tissue have highly branched collagenous reticular fibres that store lipids.

Option C:

Synapse is the junction between the axon and cell body of two successive neurons that help in the conduction of impulses.

Final answer: Newborn babies and hibernating mammals have cold resistance due to the presence of brown fat.