Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
A&P-Chapter 5
| Question | Answer |
|---|---|
| What is included in the integumentary system? | Cutaneous membrane (dermis, epidermis), accessory structures, and subcutaneous layer (hypodermis) |
| Epidermis | Comprised of 5 strata, dominated by keratinocytes |
| Stratum Basale | Deepest epidermal layer with basal cells, tactile cells, and melanocytes; no dividing |
| What is formed within the strum basal? | Epidermal ridges that extend between dermal papillae |
| Stratum Spinosum | Around 10 layers of bound keratinocytes; some dividing |
| What is contained in the stratum spinosum? | Langerhan cells (immune) |
| Stratum Granulosum | Around 5 layers of bound keratinocytes; no dividing |
| What happens within the stratum granulosum? | Cells produce keratin (flattens) and keratohyalin (dehydrates); cells nuclei and organelles disintegrate |
| Stratum Lucidum | Found only in thick skin (soles, palms) |
| What are the cells like in the stratum lucidum? | Cells flat and packed with keratin |
| Stratum Corneum | Around 30 layers of keratinocytes (protect and water resistant) |
| What do the cells look like in the stratum corneum? | Tightly bound cells shed in sheets |
| Perspiration | Internal water penetrates to surface; insensible or sensible |
| What is skin coloration based on? | Epidermal pigmentation and dermal circulation |
| Carotene | Primarily in cells of stratum corneum Converted to Vitamin A |
| Melanin | Produced in stratum basal by melanocytes Protects from UV damage |
| What causes pale skin? | Melanocytes transferred to cells in strata basale, spinosum |
| What causes dark skin? | Melanosomes transferred to cells in the strata basal, spinosum, and granulosum |
| Dermal circulation | Increases blood flow causes flushing, reduced blood flow causes paleness |
| Dermis | Vascular layers comprised of two layers deep to the epidermis |
| Papillary layer | Areolar tissue with blood and lymph vessels, and sensory neurons |
| Reticular layer | Dense irregular connective tissue of collagen (strength) and elastic (elasticity) fibers |
| Hypodermis | Layer of areolar/elastic tissues that stabilize integument wrt deeper tissue |
| What does the hypodermis contain to absorb shock? | Adipose tissue |
| What is hair produced by? | Hair follicles |
| What do the cells of hair matrix form? | Medulla, cortex, and cuticle |
| Embryonic hair | Fine hair shed before birth |
| Vellus hair | Cover most of the body; peach fuzz |
| Terminal hair | Thicker and pigmented |
| Exocrine glands | Produce exocrine secretions onto the surface |
| Sebaceous glands | Secretes sebum into hair follicle; secrete sebum onto epidermis |
| Apocrine sweat glands | Secrete secretion into hair follicle |
| Merocrine sweat glands | Secrete sweat onto epidermis |
| What are the four phases of integument regeneration? | 1. Inflammatory 2. Migratory 3. Proliferation 4. Scarring |
| Inflammatory phase | bleeding/inflammation (mast cells) |
| Migratory phase | Scab/phagocytes/basal cells migrate |
| Proliferation phase | Collagen mesh/epidermal repair |
| Scarring phase | Scab shed/epidermis complete/scar |
Created by:
madelineyork
Popular Anatomy sets