Term
| What are the 3 layers of the skin? |
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Definition
| epidermis, dermis, hypodermis |
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Term
| What are the 5 layer of epithelium in order from deep to superficial? |
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Definition
1. stratum basale
2. stratum spinosum
3. stratum granulosum
4. stratum lucidum
5. stratum corneum |
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Term
| This layer of epithelium is composed of many layers of flat, dead cells. |
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Definition
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Term
| This layer of epithelium is a translucent squamous layer that lacks organelles. |
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Definition
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Term
| This layer of epithelium is limited to thick epidermis (footpad, nose, teat). |
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Definition
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Term
| This layer of epithelium is 1-4 cells thick and composed of flat polygonal cells with basophilic granules. |
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Definition
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Term
| This layer of epithelium is 2-5 cells thick and is composed of cuboidal to squamous cells. |
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Definition
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Term
| This layer of the epidermis is attached to the basement membrane by hemidesmosomes. |
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Definition
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Term
| This layer of epithelium is composed of 1 layer of cells. |
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Definition
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Term
| In the epidermis, stem cells are located in the stratum _________. |
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Definition
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Term
| In the stratum ________, mitosis is abundant. |
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Definition
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Term
| Cells in the stratum _________ constantly proliferate and can cause cancer. |
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Definition
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Term
| The stratum basale is connected to the basement membrane by _____________. |
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Definition
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Term
| Brown dots that can be seen in the stratum basale are ___________. |
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Definition
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Term
| __________ is the cell's protection against UV light. |
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Definition
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Term
| The stratum spinosum is held together by ____________. |
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Definition
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Term
| The stratum _________ is connected by desmosomes. |
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Definition
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Term
| Closer to the basal layer, stratum spinosum cells are more _________ and are more _________ superficially. |
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Definition
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Term
| The stratum spinosum can be ____ layers in thin skin. |
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Definition
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Term
| The stratum __________ contains keratohyalin granules. |
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Definition
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Term
| Hair, feathers, and hooves are examples of ______ keratin. |
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Definition
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Term
| The corneum is made of _____ keratin. |
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Definition
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Term
| The cells in the stratum granulosum make _________ granules. |
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Definition
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Term
| _________ are derived from the neural crest during development. |
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Definition
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Term
| Melanin produced by melanocytes are taken up by _____________. |
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Definition
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Term
True or False:
You cannot differentiate melanocytes with H&E staining. |
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Definition
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Term
| Where does melanin accumulate in keratinocytes? |
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Definition
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Term
| ____________ contain cytoplasmic extensions. |
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Definition
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Term
| ________ increased production of melanin. |
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Definition
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Term
| ___________ cells are derived from monocytes. |
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Definition
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Term
| Langerhans cells contain _______ granules. |
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Definition
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Term
| _________ cells have antibodies at their surface to trap antigens and present them to lymphocytes. |
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Definition
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Term
| Langerhans cells are most prominent in the stratum _________. |
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Definition
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Term
| _________ cells are slow-acting mechanoreceptors for touch. |
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Definition
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Term
| Merkel's cells are located within the __________. |
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Definition
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Term
| _____________ are neuroendocrine cells with dense core granules. |
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Definition
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Term
True or False:
Axons that terminate on Merkel's cells are myelinated. |
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Definition
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Term
| Hair follicles are derived from the _____________. |
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Definition
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Term
| Hair follicles are located in the _______ layer of the ________. |
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Definition
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Term
| The four major components of a hair follicle are: |
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Definition
1. internal root sheath
2. external root sheath
3. dermal pappila
4. hair matrix |
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Term
| Keratinized shingles on hair are known as __________. |
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Definition
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Term
| The _________ is only found in large hairs and is made of keratinized cuboidal cells. |
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Definition
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Term
| The _____________ is a capillary network around follicles and glands. |
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Definition
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Term
| Secondary hair is smaller in diameter and has no _________. |
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Definition
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Term
| Wool is a type of _________ hair. |
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Definition
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Term
| _________ hair is associated with sweat glands, sebaceous glands, and arrector pili. |
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Definition
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Term
| ___________ hair is found either in a single or compound follicle |
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Definition
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Term
| ____________ hair is shallow and has no sweat glands nor pili muscle. |
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Definition
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Term
| Whiskers are a type of _________ hair. |
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Definition
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Term
| _________ hairs are associated with some skeletal muscles. |
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Definition
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Term
| Compound follicles are often fused at the level of the _____________. |
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Definition
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Term
| A __________ must form before cells in the dermis can send signals to stimulate the proliferation of cells in the epidermis for hair follicle development. |
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Definition
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Term
| After a placode is formed, a _____ forms from dermal condensate. |
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Definition
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Term
| During the hair cycle, after a hair follicle has been growing, _________ migrate to the bottom of the follicle and begin to form another follicle. |
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Definition
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Term
| Dogs with short hair have a _______ hair cycle. |
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Definition
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Term
| Which gene is not functional in long-haired dogs? |
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Definition
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Term
| ________ signals the hair follicle to stop growing. |
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Definition
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Term
| FGF-5 secretion is __________ in aged people. |
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Definition
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Term
| Sebaceous glands use which type of secretion mechanism? |
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Definition
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Term
| ________ glands are simple, tubular glands with a coiled secretory portion and a straight duct. |
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Definition
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Term
| Sweat glands are _________ glands. |
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Definition
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Term
| ________ glands are found mainly in areas like the nose and footpads. |
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Definition
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Term
| Unlike domestic animals, most of the primates' bodies contain _______________. |
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Definition
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Term
| What are the layers of the dermis from deep to superficial? |
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Definition
1. reticular dermis
2. papillary dermis |
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Term
| The __________ is made of connective tissue that supports the epidermis. |
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Definition
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Term
| The papillary layer is made of _____ collagen from reticular cells. |
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Definition
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Term
| The reticular dermis is made of _____ collagen and elastic fibers. |
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Definition
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Term
| ___________ is smooth muscle near hair follicles. |
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Definition
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Term
| _____________ function as pressure receptors. |
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Definition
| Lamellar/Pacinian corpuscles |
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Term
| Loss of __________ in the hypodermis causes loose and sagging skin. |
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Definition
| white fat cells and elastin fibers |
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