True Or False: The Epidermis Is Highly Vascular.
Question: TRUE
Answer: T/F?Respiration is one of the functions of the integumentary system.
Question: Epidermis, Dermis, Hypodermis
Answer: List the layers of the outer covering of the body.
Question: FALSE
Answer: T/F?The epidermis is highly vascularized.
Question: Stratified squamous
Answer: What cell type is found in epidermis?
Question: Dermis
Answer: This is the loose CT of skin, that is highly vascularized and innervated.
Question: Epidermis and dermis
Answer: The "skin" includes what layers?
Question: Keratinocytes
Answer: Another name for cells of the epidermis
Question: Stratum basale
Answer: This is the layer of cuboidal cells that rest on the basement membrane. These cells show most of the mitotic activity and renew epidermis.
Question: Hemidesmosomes
Answer: Stratum basale cells use this to anchor to the basement membrane.
Question: Stratum spinosum
Answer: This cell layer is roughly cuboidal in shape and contains "Prickle cells" that have spine like processes.
Question: Desmosomes
Answer: Stratum spinosum uses this to anchor between cells
Question: Tonofibrils
Answer: These are aggregates of cytokeratin that are visible in keratinocytes of the stratum spinosum.
Question: Stratum granulosum
Answer: A flattened layer of cells that contain keratohyaline granules.
Question: Keratohyaline granule
Answer: These are rich in cysteine and are formed by matrix bodies mixed with IF's
Question: Lamellar bodies
Answer: These are composed of glycophospholipid and are responsible for the non-wetting nature of stratum granulosum.
Question: Stratum lucidum
Answer: Thin layer of eosinophilic cells with flattened cytoplasm. Not always visible.
Question: Stratum corneum
Answer: The outer layer of cells that is very thick on soles of feet and filled with keratin.
Question: Hard keratin
Answer: This is present in nail and cortex of hair.
Question: Clear cells
Answer: This cell type may consist of Langerhans' cells, Merkel cells, and melanocytes.
Question: Langerhans' cell
Answer: This cell is derived from circulating monocytes and takes residence in the dermis.
Question: Birbeck granules
Answer: These are rod shaped granules found within Langerhans' cells
Question: Merkel cells
Answer: These are sensory cells in the basal layer of epidermis that contain catecholamine-like granules
Question: Merkel cells and melanocyte
Answer: These dermal cells are derivatives of neural crest.
Question: Melanocytes
Answer: These cells are located in the basal layer and secrete melanin granules.
Question: Cytocrine secretion
Answer: The process where melanocytes transfer melanin granules to keratinocytes
Question: FALSE
Answer: T/F?The color of skin is influenced by the number of melanocytes an individual has.
Question: Hyperpigmentation
Answer: Freckles are a result of increased localized melanocyte activity termed...
Question: Hypopigmentation
Answer: Vitiligo and albinism are examples of...
Question: Papillary layer
Answer: What layer of the dermis is vascular loose CT directly beneath the epidermis. Also commonly the site of inflammatory response.
Question: Papillary layer
Answer: The epidermis recieves nutrients from this layer via capillary diffusion
Question: Reticular layer
Answer: This layer of the dermis is dense irregular CT, composed of collagen in feltwork arrangement
Question: Langers lines
Answer: Parallel lines of connective tissue fibers that correspond to lines of stress in dermis.
Question: Eccrine sweat gland
Answer: A simple coiled tubular gland that secretes a hypoosmotic solution in response to heat via merocrine secretion.
Question: Merocrine secretion
Answer: Secretion via exocytosis into an epithelial lined duct onto the outer body surface
Question: Hypodermis
Answer: The secretory portion of an eccrine sweat gland is located in the...
Question: Simple cuboidal epithelium
Answer: The secretory portion of and eccrine sweat gland is lined with...
Question: Myoepithelial cell
Answer: A specialized smooth muscle-like cell that has eosinophilic cytoplasm
Question: Stratified cuboidal epithelium
Answer: The excretory portion of an eccrine sweat gland is lined with...
Question: Apocrine sweat gland
Answer: This gland secretes a smelly, milky secretion product. Found in armpits and external genetalia.
Question: Apocrine secretion
Answer: Secretion where part of the cell membrane is lost in the exocytosis process.
Question: Sebaceous gland
Answer: A holocrine gland that secretes an oily product onto hairs.
Question: TRUE
Answer: T/F?Cuboidal cells of the secretory portion of a sebaceous gland are continuous with basal cells of the epidermis.
Question: Black head
Answer: The opening of a sebaceous gland that goes directly onto the surface of the skin
Question: Stratified cuboidal epithelium
Answer: The epithelium of the secretory portion of a sebaceous gland.
Question: Nail plate
Answer: A semi-translucent keratin covering of the nail bed
Question: Eponychium
Answer: The technial term for the cuticle which overlaps the proximal nail plate
Question: Geminal matrix
Answer: Proliferating cells that keratinize to elongate the fingernail reside here
Question: Lunula
Answer: The pale half-moon shaped area at the base of the nail
Question: Perionychium
Answer: The softer skin on the sides of the nails
Question: Pilosebaceous unit
Answer: Hair and hair follicle grouped with a sebaceous gland
Question: Dermal papilla
Answer: This contains a blood supply for the hair follicle
Question: FALSE
Answer: T/F?Hair matrix growth proceeds continuously until the hair dies or falls out.
Question: Anagen
Answer: Growth phase of hair that involves expansion of the matrix and elongation of the hair.
Question: Catagen
Answer: Hair growth phase that that involves a decrease in matrix proliferation
Question: Telogen
Answer: Quiescent phase of hair growth
Question: Estrogen
Answer: What androgen can be used to treat hirsuitism in preadolescent males and females?