Question 41

The sebaceous gland functions to secrete sebum.

Sebaceous glands are specialized glands in the skin that produce and secrete sebum, an oily substance that helps to lubricate and protect the skin and hair.

A) connect the dermis to the epidermis

This option is incorrect because the primary function of connecting the dermis to the epidermis is performed by structures such as desmosomes and hemidesmosomes, not by sebaceous glands. Sebaceous glands do not play a direct role in this connectivity.

B) regulate body temperature

Regulating body temperature is primarily the function of sweat glands and the vascular system in the skin. While sebum from sebaceous glands can provide some water resistance, it does not actively participate in thermoregulation.

C) secrete sebum

This option is correct as it accurately describes the primary function of sebaceous glands. They secrete sebum, which is crucial for maintaining skin hydration and providing a barrier against external elements.

D) filter lymph

This option is incorrect because lymph filtration is not a function of sebaceous glands. Lymph nodes are responsible for filtering lymph, while sebaceous glands focus solely on the production of sebum.

Conclusion

The correct answer is C, as sebaceous glands are specifically designed to secrete sebum, which serves key roles in skin health. Other options, such as connecting dermal layers, regulating temperature, or filtering lymph, do not pertain to the functions of sebaceous glands and thus fail to address the question accurately.