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Skin Anatomy & Physiology Flashcards

7 cards from real CLT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Skin Anatomy & Physiology flashcards as text

  1. During wound healing after laser treatment, which phase involves fibroblast proliferation and new collagen synthesis?

    Answer: Proliferative phase

    The proliferative phase (days 4–21) features fibroblast migration, collagen synthesis, angiogenesis, and granulation tissue formation.

  2. Eccrine sweat glands are distributed across the body EXCEPT prominently on the:

    Answer: Lips and external ear canal

    Eccrine glands are absent from the lips, ear canal, glans penis, and clitoris; they are densely distributed on palms, soles, forehead, and axillae.

  3. Which skin layer is most directly responsible for transepidermal water loss (TEWL)?

    Answer: Stratum corneum

    The stratum corneum's lipid bilayers (ceramides, fatty acids, cholesterol) regulate TEWL; damage to this layer increases water evaporation significantly.

  4. Apocrine sweat glands differ from eccrine glands primarily because they:

    Answer: Empty into hair follicles and become active at puberty

    Apocrine glands open into hair follicles (not directly onto skin), become active at puberty, and produce a viscous secretion that causes odor when metabolized by bacteria.

  5. The vascular plexus known as the 'subpapillary plexus' supplies blood to which skin region?

    Answer: Papillary dermis and epidermis

    The subpapillary (superficial) plexus lies at the dermis-epidermis junction and supplies the papillary dermis and provides nutrients diffusing into the avascular epidermis.

  6. In skin histology, 'rete ridges' refer to:

    Answer: Downward projections of the epidermis that interlock with dermal papillae

    Rete ridges are finger-like downward extensions of the epidermis that interdigitate with dermal papillae, increasing surface area for nutrient exchange and adhesion.

  7. Which pigment type produces yellow-red coloration and is associated with lower laser hair removal efficacy?

    Answer: Pheomelanin

    Pheomelanin is the yellow-red pigment in blonde and red hair; it absorbs laser energy less efficiently than eumelanin, making red/blonde hair more difficult to treat.