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
BIOL 214
Lab Practical - Integumentary
| Question | Answer |
|---|---|
| The skin can be divided into two main components... | epidermis and the dermis |
| What are the five layers of skin? | Stratum corneum Stratum lucidum (found only in thick epidermis) Stratum granulosum Stratum spinosum Stratum germinativum (basale) |
| What layer of skin is only found in the thick epidermis? | stratum lucidum |
| The base layer of the epidermis is called the ____________. | stratum germinativum |
| What layer contains special cells called melanocytes? | stratum germinativum |
| What are melanocytes? | they dictate the color of our skin |
| Melanocytes produce what? | melanin |
| Melanin absorbs what? | UV radiation |
| For those who have low melanocyte activity, skin color is determined by two other factors: | Carotene: orange pigment Dermal blood supply: rosy appearance |
| The epidermis is secured to the what? | dermis |
| These two structures act as a lock in the dermis... | epidermal ridges and dermal papillae |
| Where can epidermal ridges and dermal papillae be found? | the fingers and soles of the feet |
| Excessive friction may cause the two layers to separate, filling the space with interstitial fluid thus creating a __________. | blister |
| Epidermal ridges that extend into the stratum corneum are known as ______________. | fingerprints |
| The dermis lies below the ________. | epidermis |
| The epidermis contains what structures? | blood vessels, nerves, sensory receptors, extracellular fibers, hair follicles, and glands |
| Blood Vessels (arteries and veins) are divided by location, what are the locations? | superficial and deep |
| Nerves interpret information from specialized ______________. | sensory receptors |
| The sensory receptors found in the integumentary system are called ... | Meissner’s corpuscles Pacinian corpuscles Merkel cells |
| Meissner's corpuscles detect what pressure? | light pressure |
| Pacinian corpuscles detect what pressure? | heavy pressure (i.e. pacific ocean) |
| Merkel pressure detects what pressure? | soft touch (i.e. Erkel) |
| What are the two extracellular fibers? | collagen and elastin |
| hair and nails are comprised of what two structures? | protein keratin and function to protect integumentary system |
| Hair is found across the body except for what places? | the soles of the feet, palms of the hand, lips, and portions of external genitalia (pubic regions of females, more wide spread on males d/t testosterone production) |
| What is terminal hair? | typically long and thick |
| Where is terminal hair found? | head, eyebrows, eyelashes, and pubic regions |
| What is vellus hair? | typically short and thin, lighter in color |
| Where is vellus hair found? | these hairs comprise most (75%) of the hair on the body on the |
| What is the Arrector pili muscle? | it is the nervous stimulation that lifts the shaft, increasing skin sensitivity |
| What is the Papilla? | it is a vascular structure that provides nutrients |
| What is the matrix? | it is the location of new hair growth |
| What are the Shaft Layers (superficial to deep)? | Cuticle Cortex Medulla |
| what is the nails function? | strengthen the distal portion of digits |
| What is the function of the Nail Matrix? | mitotically active zone of nail growth |
| What is the lunula? | newly formed and undifferentiated white cells of nail body |
| What is the purpose of the eponychium? | epidermal cells dragged forward along the body as the nail grows, otherwise known as the cuticle |
| What is the hyponychium? | epidermal cells dragged beneath the body as the nail grows |
Created by:
ccporter13
Popular Anatomy sets