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BIO101 Ch 5 Skin
Question | Answer |
---|---|
Projections of loose connective tissue from the dermis, which extend upward between the adjacent ridges of the epidermis, are called ________. | dermal papillae |
Where is thick skin found? | Palms of hands and soles of feet |
The skin is what type of membrane | Cutaneous (epithelial) |
Epidermal cells are supplied with nutrients from blood vessels in the | Dermis |
What is the function of the combination of epidermal ridges and dermal papillae? | increase surface area for diffusion between the dermis and epidermis |
What cell is responsible for pigment production in the skin? | Melanocyte |
What makes up the majority of hair and nails? | keratin |
What protein is responsible for pigmentation in the skin? | Melanin |
What is the medical term for a sweat gland? | Sudoriferous gland |
What is missing in albinism? | Melanin |
What layer of skin differentiates thin skin from thick skin? | Epidermis |
What does UV radiation stimulate the production of in the skin? | Vitamin D3 |
What does melanin serves to protect cells from in the deeper layers of the epidermis? | UV (ultraviolet) radiation |
The dermis is composed largely of ________. | dense irregular connective |
What is the most common type of skin cancer? | Basal cell carcinoma |
What is the function of the nerve fiber attached to the hair follicle? | For early warning for possible danger |
When the body is over heated what happens in the skin? | blood vessels dialate |
What muscle causes the hair on the skin to rise (goosebumps)? | arrector pili muscles |
The pale crescent area of the nail is called the | lunula |
What is the function of melanin? | Protects against UV damage |
A thickened area of scar tissue that is covered by a shiny, smooth epidermal surface is called a(n) | keloid |
During skin repair, most of the scab consists of an insoluble network of ________, a protein that forms from blood proteins during the clotting response | granulation tissue |
A "rug burn," which scrapes the skin, is an example of a(n) | abrasion |
The study of tissues is called | histology |
secretions are discharged onto some external or internal body surface through | a duct |
What accounts for most of the volume of connective tissues | extracellular matrix |