Term
| Hair thinning? whats the process? |
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Definition
| after 40 hair slows growth, hairs aren't replaced as fast as they are shed; this leads to hair thinning, baldness or Alopecia. Thinning begins at the anterior and proceeds to posterior. Most common type is male pattern baldness, this is a genetically determined sex influenced condition.This is thought to be caused by a delayed action gene-this changes the response of the hair follicles to DHT (dihydrotestosterone). Results growth cycles short and some hairs never emerge and other are thin & peach fuzz-like. |
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Term
| what is the description of burns? |
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Definition
| Burns is tissue damage inflected by intense heat, electricity, radiation, or certain chemicals. All of which denature cell proteins and cause the cell death in affected areas. |
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Term
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Definition
| Damage to epidermis usually takes 1 to 3 days to heal. |
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Term
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Definition
| Damage to Epidermis and Dermis. Blisters will appear. Takes 3 to 4 weeks to heal. |
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Term
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Definition
| Full thickness burns involving the full thickness of skin. Requires skin grafting and are severe. When these types of burns occur a patient will need immediate fluids to stay alive. |
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Term
| what are the functions of skin? |
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Definition
Protection: 3 types of barriers from chemicals, physical, and biological.
Body temp regulation, sensation, synthesizing vitamin D, blood reservoir and excretion. |
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Term
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Definition
Sweat glands all over the body.
two types Eccrine sweat glands and apocrine glands. |
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Term
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Definition
| or Merocrine sweat glands are abundant in palms, soles of feet and fore head. Their role is to prevent over heating. |
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Term
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Definition
| confined to armpits (axillary) and anogential area. Function is unknown. |
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Term
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Definition
| found in the lining of the ear, produces earwax that protects against foreign materials. |
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Term
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Definition
| Oil glands. They are found all over the body except in the thick skin (palms and soles of feet). these glands are small on trunk of the body and limbs but quite large on face, neck, and upper chest. |
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Term
| How do Sebaceous glands work? |
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Definition
| they secret an oily substance called sebum, which softens and lubricates the skin and hair. |
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Term
| What are the cells of the Epidermis? |
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Definition
| Keratinocytes and Melanocytes |
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Term
| What do Keratinocytes do? |
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Definition
| they produce keratin- the fibers that helps give the epidermis it's protective properties, these cells are constantly undergoing mitosis. |
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Term
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Definition
| they synthesize the pigment melanin found in the deepest layer of the epidermis that gives color to the skin. |
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Term
| How can skin tell you when the dermis has been injured? |
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Definition
| the skin will appear black and blue, marks reveal where blood escaped from the circulation and clotted beneath the skin. |
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Term
| What are the Layers of the dermis? |
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Definition
| Papillary Layer and Reticular Layer |
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Term
| Papillary Layer? structure and function? |
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Definition
| (thin superficial) is areolar connective tissue with fine interlacing collagen and elastic fibers. It's a loosely woven mat were defense cells wonder freely as they patrol the area for bacteria. |
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Term
| Reticular Layer: structure? |
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Definition
| Dense fibrous connective tissue, makes up 80% thickness of dermis. |
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Term
| What are the five layers of the cells in the epidermis? |
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Definition
| Stratum Corneum, Stratum Lucidum, Stratum Granulosum, Stratum Spinosum, Stratum Basale. |
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Term
Stratum Corneum: structure? and function?
Location? |
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Definition
| 20 to 30 cell layers. Outer layer of epidermis. Protects the skin against abrasion, penetration, and the glycolipid between it's cells nearly waterproofs this layer. Protecting the body from the hostile environment and water loss. |
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Term
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Definition
| Clear layer consist of 2 to 3 rows of dead keratinocytes with indistinct boundaries. this is the layer under the stratum corneum. |
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Term
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Definition
| Middle layer. 3 to 5 layers in which keratinocytes appearance drastically changes and the process of keratinization begins. |
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Term
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Definition
| Second deepest layer. Several layers of keratinocytes unified by desmosomes. Cells contain thick bundles of intermediate filaments made of pre-keratin. |
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Term
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Definition
| Deepest layer of the epidermis. The role is to continue to renew cell population. |
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Term
| What are the 3 major layers of the skin? |
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Definition
| hypodermis, dermis, epidermis |
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Term
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Definition
| stores fat, acts as a shock absorber, and a insulator that reduces heat loss from the body. |
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Term
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Definition
| strong connective tissue and is the second major skin region. Protects against impact. |
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Term
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Definition
| Outer layer of skin, it's a keratinized stratified squamous epithelium consisting of four different cell types or 5 different layers. |
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Term
| What are the developmental aspects of the integumentary system? |
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Definition
| Epidermis develops from embryonic ectodern and the hypodermis and dermis develop from mesoderm, by the fourth month of development skin is well formed. |
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Term
| What are the cells to the Epidermis? |
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Definition
| Keratinocytes, melanocytes, Langerhans cell, and merkel cells. |
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Term
| what is the correct order of the layers of the epidermis? |
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Definition
outer to inner layer: Stratum Corneum
Stratum Lucidum
Stratum Granulosum
Stratum spinosum
Deepest layer: stratum basale |
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