Ch4 Flashcards
What are three important functions of integumentary system?
Protection, regulation of heat loss, reception of information of external environment.
What are two major categories of body membranes?
Epithelial tissue, connective tissue
The protein that provides a water-repellent and toughening quality of the skin is —.
Keratin
What is main function of melanocytes ?
They protect DNA from ultraviolet radiation and produce a wide range of pigment colors.
The outermost layer of the skin is composed of which type of tissue?
Stratified squamous epithelium
Which layers of the skin separate when blisters form?
In a blister, epidermis separates from dermis
The papillary layer attaches to the —.
Stratum basale and reticular layer
The type of tissue making up the bulk of the dermis is —.
Dense (irregular) connective tissue
What kind of membranes line body cavities that, except for the dorsal body cavity and joint capsules, do not open to the outside of the body?
Serous
- mucous membranes line body cavities that open to the exterior.
Synovial membranes are composed of —- tissue, and line joint cavities as well as bursa and tendon.
Soft areolar connective tissue
Two types of sweat glands are — and —.
Eccrine, apocrine
In thorax, — — isolate lungs and heart from one another.
Serous membranes
How do the body locations of serous and mucous membranes differ?
Serous membrane located in ventral cavities closed to the exterior.
Mucous membrane lines body cavities open to the exterior (respiratory, digestive, urinary, reproductive organ cavities)
Where would you find synovial membranes?
Lining a fibrous joint capsule surrounding a joint
What is the blister?
Accumulated interstitial fluid in the cavity between dermis and epidermis due to a burn or friction.
Is hypodermic (subcutaneous tissue) a part of skin?
No.
It is essentially adipose tissues. It does anchor the skin to underlying organs and provide sites for nutrient storage. It is also a shock absorber. It insulates deeper tissues Curves in woman body
What is the most cells in epidermis?
Keratinocytes
Produce keratin, the fibrous protein that makes epidermis a tough and protective layer.
—- — — in epidermis, are important in alerting and activating immune system cell to a threat such as bacteria or viral invasion.
Epidermal dendritic cells
— — are seen at the junction of epidermis and dermis. It is associated with nerve endings and serve as touch receptors.
Merkel cells
What are included in skin appendages?
Cutaneous glands, hair and hair follicles, nails
The cutaneous glands are all — — that release their secretions to the skin surface via ducts.
Exocrine glands
Cutaneous glands are formed by the cells of the — —, they push into deeper skin regions and ultimately reside almost in the dermis.
Stratum basale
Sebaceous glands’ ducts usually empty into — —, but some open directly onto skin surface.
Hair follicle.
What is the function of sebum?
Keep skin moist and soft
Contain chemicals to kill bacteria
Prevent hair from brittle
Hair produced by —.
Hair follicles
Hair pigment is made by — in the —.
melanocytes, hair bulb
When the burn is considered critical?
- over 25% of body second degree burn
- over 10 % of the body third degree burn
- third degree burn on fave, hands, or feet
Which structure of skin produces the patterns for fingerprints?
Papillary layer of the dermis
How the integumentary system protect body from desiccation?
By containing water proofing glycolipid and keratin.
Protective protein prevent water loss from skin in stratum corneum.
Desiccation: drying out
How the integumentary system protect body from ultraviolet radiation ?
melanin produced by melanocytes offers protection from ultraviolet radiation.
How vt.D can be synthesized?
Modified cholesterol molecule in skin converted vt.D by sunlight.
What are located in reticular layer in dermis?
Blood vessels
Sweat and oil glands
Deep pressure receptor
What are the two types of fibers composed of dermis?
Collagen fiber-toughness
Elastic fiber-elasticity
What is associated danger from burn?
Electrolyte imbalance
Dehydration
Circulatory shock
