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A&P Chapter 5
Integumentary System
Question | Answer |
---|---|
2 regions of the skin | Epidermis, dermis |
Most superficial layer of skin | Epidermis |
4 cell types found in the epidermis | Keratinocyte, melanocyte, epidermal dendritic cells, tactile cells |
Fibrous protein that gives skin protective properties | Keratin |
Cell that synthesizes melanin | Melanonocyte |
Langerhans cells | Epidermal dendritic cells |
Cells that activate the immune system | Epidermal dendritic cells |
Tactile sensory receptor cell | Merkel cells |
Most superficial layer of the epidermis | Stratum Corneum |
Deepest epidermal layer | Stratum Basale |
aka Stratum germinativum | Stratum Basale |
Layer responsible for cell renewal | Stratum Basale |
aka prickly layer | Stratum Spinosum |
Contains keratinocytes linked by desmosomes | Stratum Spinosa |
This layer contains a high volume of Langerhans cells | Prickly layer |
Lamellated granules | Stratum granulosum |
3-5 cell layer where keratization begins | stratum granulosum |
Glycolipids which cause the skin to be waterproof are in which layer | Stratum granulosum |
aka Horny layer | Stratum corneum |
Thickest epidermal layer | stratum corneum |
Layer with fully keratinized cells | stratum corneum |
Layer found only in the thick skin | stratum lucidium |
Layer above the stratum granulosum in the thick skin | stratum lucidium |
Layer of skin associated with leather-"hide" | Dermis |
Superficial layer of the dermis | Papillary layer |
Layer of Areolar C.T. | Papillary layer |
Projections of the papillary layer that project into the epidermis | dermal papillae |
Friction ridges and sweat glands combine to form: | Fingerprints |
Meissners corpuscles | Light touch receptors |
Layer of the dermis made of dense irregular C.T. | Reticular layer |
Thicker part of the dermis | Reticular layer |
Bundles of collagen | Cleavage/tension lines |
Dermal folds near joints | Flexure lines |
Crimson pigment | Hemoglobin |
Cyanosis | Bluing of skin during heart failure and severe respiratory disorders |
aka merocrine glands | Eccrine glands |
Sweat glands abundant on palms, soles of feet and forehead | Eccrine glands |
2 types of sweat glands | Eccrine and apocrine |
aka sudoriferous glands | sweat glands |
Sweating is regulated by this system | Autonomic nervous system |
Most abundant sweat gland | Eccrine gland |
Sweat glands activated by puberty | Apocrine glands |
Sweat gland found in the axillary and genital areas | Apocrine gland |
Gland found in the external ear | Ceruminous gland |
Modified sweat gland | Mammary gland |
Gland that produces cerumen | Ceruminous gland |
Gland producing sebum | Sebaceous gland |
Glands which dump product into the hair follicle | Apocrine and sebaceous |
Holocrine type gland | Sebaceous gland |
Glands activated during puberty | Apocrine and sebaceous |
What forces sebum out of the hair follicle onto the skin? | Arrector pili |
What is created by the low pH of the secretions on the skin? | Acid mantle |
What forms the chemical barrier on the skin? | Acid mantle |
What forms the physical barrier of the skin? | Keratinized cells and glycolipids |
What creates the biological barrier of the skin? | Dendritic cells and macrophages |
Unnoticeable sweating | Insensible sweating |
Obvious sweating-visible | Sensible sweating |
Pacinian corpuscles | Deep pressure sensors |
How much blood can the skin hold? | 5% of total volume |
Metabolic function of the skin | Sunlight turns cholesterol into inactive vit D |
Skin as a secondary excretion organ | small amount of nitrogenous wastes in the sweat |
Least malignant cancer | Basal cell carcinoma |
Most malignant cancer | Melanoma |
Cancer of the stratun basale cells | Basale cell carcinoma |
Cancer of the keratinocytes of the stratum spinosa | Squamous cell carcinoma |
Cancer of the melanocytes | Melanoma |
Rules for recognizing melanoma | Asymmetry, Border, Color, Diameter |
Tissue damage caused by heat | Burn |
Body area burned | Rule of nines |
Cheesy looking substance protecting the skin of a fetus | Vernix caseosa |