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Health Science 1- Ch. 8: Integumentary System
Terms in this set (35)
How many functions does the skin have?
The skin covers underlying tissues to protect against...
dehydration, injury, and germ invasion
1. T/F- The skin does not have the ability to regulate body temperature
1.False, regulates body temperature, controlling the amount of heat loss(evaporation)
2. T/F- The skin Produces Vitamin K
2. False, it helps manufacture vitamin D
Skin serves as the site of many...
Skin temporarily stores...
Fat, glucose, water, and salts
3. T/F- Skin screens out ultraviolet radiation
The skin absorbs certain...
drugs and chemical substances
The outermost covering of epithelial cells with no blood vessels
"True Skin" made up of connective tissue and is vascular
(Hypodermal Layer) lies under the dermis and consists of loose connective tissue
How many cell types are in the epidermis?
How many layers are in the epidermis?
4. T/F- The thickness is the same across the epidermis
4. False, the thickness varies, thinnest on eyelashes and thickest on palms of hands and soles of feet
Protein that keeps the skin dry and provides a waterproof covering, resisting evaporation and preventing excess water loss
Comprise most of the epidermis and produce the protein keratin
Sensory receptors for touch
Make the protein melanin, which protects the skin against the UV rays of the sun
Macrophages which are effective in the defense of the skin against macrophages
stratum germinativum(stratum basale)
Goes through mitosis, deepest layer of epidermis, consists of cells that are mostly keratinocytes and some melanocytes and merkel cells, lower edge contains ridges called papillae
Arise from the dermal layer and push into the stratum germinativum, provide maximum resistance to slipping when grasping and holding objects; fingerprints
Cells look like they have spines(due to fixation preparation), Contain keratinocytes, contain some melanin granules and langerhans' cells, 8-10 cell layers thick
3-5 cell layers of keratinocytes, cells are flat, cells begin to die here due to being so far away from capillaries of dermis
Appears Translucents, consists of a few rows of dead keratinocytes, only visible on thick skin
10-30 cells layers thick, prevents water loss, protection from external environment, cells are slightly acidic for protection, Can be keratinized or non-keratinized, keratinized on hands/feet
5. T/F- The Dermis Layer is the inner, thicker layer of skin
The Dermis layer contains matted masses of...
Connective Tissue, collagen tissue bands, elastic fibers, blood vessels, nerve endings, muscles, hair follicles, oil and sweat glands, and fat cells
Free Dendritic nerve endings of sensory neurons
Located in the dermis, epithelia glands, sense pain, heat, cold, and pressure
At the base of epidermis of skin, sense light pressure
Root hair Plexuses
In and surrounding hair follicles, feel hair deflection
Dermal Papillae of hairless skin-lips, eyelids, nipples, fingertips, light pressure, vibration
Subcutaneous tissue of sin, deep pressure, stretch, vibration
6. T/F- Subcutaneous layer is not a true part of the integumentary system
7. T/F- The subcutaneous layer contains 3/4ths of the body's stored fat
7. False, it contains about 1/2 of the body's stored fat
The subcutaneous layer attaches the integumentary system to the..
surface muscles underneath
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