Question

question 3
adipose tissue in the hypodermis:
a connects the dermis with the epidermis
b is absent in infants
c provides protection against infection
d serves as a storage site for fat, which can be used for energy
e helps to lower body temperature

Explanation:

• Option A: The hypodermis (subcutaneous layer) is below the dermis. The dermis and epidermis are connected by the basement membrane, not adipose tissue in the hypodermis.
• Option B: Infants have adipose tissue in the hypodermis. In fact, infants have a relatively high proportion of body fat compared to adults in some areas.
• Option C: Structures like the epidermis (with keratinocytes, Langerhans cells etc.) and the immune - related cells in the dermis (such as macrophages) are more involved in protection against infection. Adipose tissue in the hypodermis is not the main structure for infection protection.
• Option D: Adipose tissue in the hypodermis is a major site for fat storage. Fat (triglycerides) can be broken down (lipolysis) into glycerol and fatty acids, which can be used for energy production (e.g., through beta - oxidation of fatty acids in mitochondria).
• Option E: Structures like sweat glands (eccrine and apocrine) are more involved in lowering body temperature (through evaporative cooling). Adipose tissue in the hypodermis acts as an insulator (helping to retain heat rather than lower body temperature in a direct sense).

Answer:

D. serves as a storage site for fat, which can be used for energy