ATI Pathophysiology Practice Exam

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Prepare for the ATI Pathophysiology Exam. Study with flashcards and multiple choice questions, each question includes hints and explanations. Ensure your readiness for the exam!

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What is a wax-like substance secreted by glands in the external ear canal?

Sebum
Keratin
Cerumen
Collagen

The correct answer is: Cerumen

Cerumen, commonly known as earwax, is the wax-like substance produced by specialized glands located in the external ear canal. Its primary function is to protect the ear by trapping dust, debris, and microorganisms, preventing them from reaching the eardrum. Cerumen also has antimicrobial properties that help to minimize the risk of infections. In the context of the other substances mentioned, sebum refers to the oily substance produced by sebaceous glands in the skin, which provides lubrication and waterproofing. Keratin is a structural protein found in the skin, hair, and nails, contributing to their strength and resilience. Collagen is a protein found in connective tissues throughout the body, providing support and structure. While all these substances play important roles in various physiological functions, cerumen specifically relates to the external ear canal and serves its unique protective role.