Which of the following are types of burns? Select All That Apply.

Rationale:

A. Wheezing occurs when airflow passes through narrowed or obstructed airways, as seen in conditions like asthma, chronic bronchitis, or bronchiolitis. The turbulence created by bronchospasm, inflammation, or mucus accumulation produces a characteristic high-pitched, musical sound, typically heard during expiration, although severe obstruction can produce wheezing during both inspiration and expiration.

B. Crackles (rales) are intermittent, popping sounds caused by the sudden opening of small, fluid-filled airways in conditions such as pulmonary edema, pneumonia, or interstitial lung disease. They are not associated with airway narrowing from bronchospasm.

C. This description corresponds to rhonchi, which are caused by airflow through larger airways obstructed with thick secretions. Rhonchi are different from wheezing, which is high-pitched and usually occurs in smaller bronchioles.

D. Silent breathing indicates severe airway obstruction or near-complete airway closure, which is a medical emergency. While it may occur in extreme cases of asthma, it is not a characteristic feature of wheezing in narrowed airways.

Rationale:

A. These cells are found in the epidermis, specifically in the stratum corneum, which forms the outermost layer of the skin and provides a protective barrier. They are not part of the dermis.

B. Keratinocytes, responsible for producing keratin, are located primarily in the epidermis. While keratin provides structural strength to the skin, hair, and nails, the dermis contains connective tissue, not keratin-producing cells.

C. The dermis contains a variety of sensory receptors, including Meissner’s corpuscles for light touch, Pacinian corpuscles for pressure and vibration, and free nerve endings for pain and temperature. These structures are embedded within the connective tissue of the dermis and allow the skin to detect external stimuli.

D. Melanin-producing melanocytes are incorrect. Melanocytes are located in the basal layer of the epidermis, where they produce melanin to protect against ultraviolet radiation. They are not found in the dermis.