Question 23

Ceruminous glands secrete ear wax.

Ceruminous glands are specialized glands located in the ear canal that produce a substance known as ear wax, or cerumen. This secretion plays a crucial role in protecting the ear by trapping dust and debris and preventing infections.

A) Ear wax

This option is correct as ceruminous glands specifically produce ear wax, which serves important functions in ear health. Ear wax not only lubricates the ear canal but also has antibacterial properties that protect the ear from infections.

B) Keratin

Keratin is a fibrous protein that is a key structural component of hair, nails, and the outer layer of skin. While keratin is present in the skin and hair, it is not secreted by ceruminous glands, making this option incorrect.

C) Mucus

Mucus is a viscous secretion produced by mucous membranes throughout the body, primarily serving to trap pathogens and particles. However, ceruminous glands do not produce mucus; thus, this option is not correct.

D) Oily sebum

Sebum is an oily substance secreted by sebaceous glands to lubricate the skin and hair. Since ceruminous glands are distinct from sebaceous glands and specifically secrete ear wax, this option is also incorrect.

Conclusion

In summary, ceruminous glands are specifically responsible for the production of ear wax, which is essential for ear protection and health. The other options, including keratin, mucus, and oily sebum, are secreted by different types of glands and do not accurately describe the function of ceruminous glands. Therefore, option A is definitively correct.