Exam 2 Flashcards
The superficial layer of the cutaneous membrane is called the
Epidermis. The superficial epidermis consist of carrots and I stratified squamous epithelium that rest on top of the basement membrane
What happens to the sweat glands and blood vessels when body temperature increases
In response to increase in body temperature, sweat glands were really sweat for evaporated cooling and blood vessels will dilate so that the heat can dissipate
The main components of skin are the
Epidermis and dermis
The epidermis is
Keratinized cutaneous membrane
How do nutrients reach the epidermis of the skin?
Defusion transports nutrients from blood vessels in the dermis into the epidermis
What is not a function of the skin
To synthesize vitamin A
Why is vitamin D necessary
Vitamin D is required for calcium absorption from the small intestine
True or false: subcutaneous injections are placed into the hypodermis beneath the skin
True
True or false: thermal receptors detect temperature changes in the skin and internal body fluids
True
Which sensation is not detected by the skin
Equilibrium
Where are the stem cells of the epidermis located
Stratum basale
The stratum basale is the deepest layer of the skin and contains stem cells that undergo mitosis
The most numerous cells of the epidermis are the
keratinocytes
Skin without keratin would be more likely to
Tear upon being mechanically stressed
Trauma to stratum basale. Would not interfere with the skin’s ability to
Shed dead cells
What type of cell junction bands together adjacent cells, making the epidermis stronger
Desmosomes
Which layer of the epidermis is characterized by prominent cytoplasmic granules in the cells
Stratum granulosum
Thin skin lacks what type of stratum
Lucidum
Thick skin lacks
Hair follicles
Dermal papillae
House tiny blood vessel where oxygen and nutrients diffuse into the extracellular fluid of the dermis and up into the cells of the avascular epidermis
How do tension or cleavage lines form
Because of gaps between the bundles of collagen that indent the epidermis. Tension lines normally run in a circular pattern in the neck and trunk but longitudinally in the head and upper lower limbs
If you administer a subcutaneous injection, the needle will penetrate the layers and which of the following orders starting from the skin surface
Epidermis, papillary layer of dermis, reticular layer of dermis, subcutaneous layer
A surgical incision along tension lines
Closes and heels with relatively little scarring
