CH 5: Epidermis - Layers, Cells, Functions
About this set
Created by:
aaycinena on February 20, 2010
Subjects:
anatomy, human anatomy, Epidermis layers, epidermis, keratinocytes
Description:
From pg. 107-110 of
Human Anatomy (5th ed.)
Marrieb, Mallatt, Wilhelm
Classes:
Log in to favorite or report as inappropriate.
Order by
21 terms
Terms | Definitions |
|---|---|
 Integumentary System | The epidermis is the outer layer of this body system |
| Epidermis, Dermis, Hypodermis, Deep Fascia, Muscle | Organize these terms from most superficial to most deep: Deep Fascia, Dermis, Epidermis, Hypodermis, Muscle |
| Stratified Squamous | The epidermis is a keratinized ____ ____ epithelium. |
| Keratinocytes, Langerhans Cells, Melanocytes, Merkel Cells | Name the 4 distinct types of cells found in the epidermis (alphabetical) |
| Keratinocytes | ____: These cells actively regenerate in the deeper layers of the epidermis. The most abundant epidermal cells. |
| Keratin | Keratinocytes produce ____, a fibrous protein that gives the epidermis its protective properties. |
| Desmosomes | Keratinocytes are tightly connected by a large number of ____ (a type of cell junction). |
| Stratum Basale, Stratum Corneum | Keratinocytes reproduce almost continuously in the ____ ____, are pushed up by new cell production, until they reach the ____ ____, where the rub off, a process which takes around 35 to 45 days. |
| Melanocytes | ____: These pigment producing cells make up 10 to 25% of the stratum basale |
| Melanin, Keratinocytes | Melanocytes make a dark skin pigment ( ____ ) in membrane-walled granules, and then transfer this pigment to nearby ____, via cell processes ("spider-legs") |
| Superficial, UV Rays | Melanin tends to cluster on the ____ side of keratinocytes, shielding the nuclei from ____ ____. |
| Lysosomes, Stratum Basale (Basal Layer) | In light-skinned people, melanin is digested by keratinocyte ____, a short distance above the ____ ____. In dark-skinned people, no such digestion occurs, so melanin occupies keratinocytes throughout the epidermis. |
| Merkel Cells, Nerve Ending | ____ ____: These hemi-sphere shaped cells are intimately associated with a disclike sensory ____ ____ and may serve as a receptor for touch. |
| Langerhans Cells, Receptor-Mediated Endocytosis, Lymph Node | ____ ____: As part of the immune system these cells take up antigens that have invaded the epidermis via ____-____ ____, then leave the skin and travel to a nearby ____ ____ and initiate an immune response to cells that carry that antigen. |
| Keratinocytes, Melanocytes, Merkel Cells | The stratum basale contains these 3 types of cells |
| Keratinocytes, Langerhans Cells | The Stratum Spinosum contains mainly these 2 types of cells |
| Keratinocytes, Keratohyalin Granules, Lamellated Granules | The Stratum Granulosum contains mainly this 1 type of cell ( ____ ), which starts to produce ____ ____ and ____ ____, the granules that give the stratum its name |
| Keratohyalin Granules | ____ ____:These granules accumulate in keratinocytes of the stratum granulosum, helping to form keratin in the more superficial layers. |
| Lamellated Granules, Glycolipid | ____ ____:These granules accumulate in the keratinocytes of the stratum granulosum, and contain a waterproof ____ that is excreted into extracellular space helping to slow water loss across the epidermis. |
| Keratinocytes, Dermal Capillaries | The Stratum Lucidum contains mainly this 1 type of cell ( ____ ). At this superficial layer, the cells are dead, being too far from ____ ____ to receive nourishment. |
| Keratinocytes, Tonofilaments | The Stratum Corneum contains this 1 type of cell ( ____ ). The cells are dead flat sacs completely filled with keratin because their nuclei and organelles disintegrated upon cell death. Keratin consists of ____ embedded in a "glue" from the keratohyalin granules. |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.