| Question |
Answer |
| The dermis is comprised of _______ and supports the nerve and vascular network. |
|
Collagen bundles
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| The subcutaneous layer of the integumentary system is composed of _________. |
|
Fat and loose connective tissue
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| What are the two major types of epidermal cells? |
|
Keratinocytes (majority) and the melanocytes
|
| Melanocytes are housed in the stratum ___________ of the epidermis, also known as the basal layer. |
|
Stratum Germinativum
|
| What is the function of melanocytes? |
|
To give color to the skin and hair and protect the body from UV light
|
| __________ are epidermal cells that are synthesized in the basal layer and move to the surface where they flatten and die to form the stratum corneum (outer layer). |
|
Keratinocytes
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| Keratin is a fibrous protein produced by keratinocytes that is vital for __________. |
|
The protective barrier function of the skin
|
| Changes in _______ account for many skin problems, such as psoriasis. |
|
Cell cycle
|
| What is the function of the dermis? |
|
It assists in regulation of body temperature and blood pressure
|
| Which layer of the dermis is responsible for the formation of fingerprints? |
|
Papillary layer
|
|
|
| _________ forms the greatest part of the dermis and is responsible for the mechanical strength of the skin. |
|
Collagen
|
| The primary cell type of the dermis is the __________. |
|
Fibroblast
|
| Fibroblasts produce collagen and elastin fibers and are important for _________. |
|
Wound healing
|
| Where are nerves, lymphatic vessels, hair follicles and sebaceous glands located in the integumentary system? |
|
In the dermis
|
| T/F Subcutaneous tissue lies beneath the dermis and is part of the skin. |
|
False. It is not part of the skin, it lies directly beneath the dermis attaches skin to underlying bone and muscle
|
| What are the functions of subcutaneous tissue? |
|
It attaches skin to underlying muscle and bone, provides insulation, stores lipids, regulates temperature and provides shock absorption
|
| What structures are considered skin appendages? |
|
Hair, nails, sebaceous, eccrine and apocrine glands
|
| The ________ layer develops skin appendages and the ________ layer provides nutrients, electrolytes, and fluids. |
|
Epidermis develops them, dermis feeds them
|
| What places on the body grow no hair? |
|
The lips, palms of the hands and soles of the feet
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| Nails grow from the matrix, also called the _______. |
|
Lunula (crescent shaped area of the nail)
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