Skin/Integumentary System Flashcards
Multiple sensory modalities, fine touch, heat, cold and pain
Free nerve endings
Skin receptors that allow for: Cutaneous sensation
Merkel corpuscles
Deep pressure skin receptors
Pacinian Corpuscles
Cold skin receptors
Kraus end bulbs
Touch
Lips, palmar & volar surfaces receptors
-Appears as twisted skein of wool
Meissner corpuscles
Stretch and torque of collagen fibers receptors
Ruffini corpuscles
What is the largest skin cell population?
Keratinocytes
Pigment producing cells of the epidermis
Melanocytes
Mechanoreceptors of the skin
Merkel Cells: also associated with sensory nerve endings
Antigen presenting cells (APC’s)
Langerhan cells: plays a role in immunological function of skin
Which type of skin cell contributes to the formation of the epidermal water barrier?
Keratinocytes
Function of hemidesmosomes
Links keratinocytes to Basement membrane
Function of Desmosomes
Links keratinocytes to each other and cells of spinosum layer
Large-lumen tubular glands associated with hair follicles
Apocrine glands
Locations of apocrine sweat glands
Axilla, areola, nipple of the mammary gland, skin around the anus, and the external genitalia
Locations of eccrine sweat glands
Distributed over the entire body surface except for the lips and part of the external genitalia
Long phase of active growth in hair
anagen
Short phase of involution in hair growth
Catagen
Short inactive phase of hair growth
Telogen
Hyperkeratosis
Thickening of the stratum corneum
Parakeratosis
Retention of nuclei in the keratinocytes of the stratum corneum
Acanthosis
Increase in thickness of the stratum spinosum
Acantholysis
Broken bonds between cells of the epidermis leading to separation of these cells from each other.
