Integumentary System Flashcards
1
Q
Skin consists of
A
- sebaceous glands, sweat glands, hair, nails
2
Q
Functions of skin: protection
A
from pathogens and chemicals
3
Q
Functions of skin: secretion
A
- sebaceous glands secrete sebum (oil) = waterproof
- sweat glands associated with homeostatic thermoregulation
- sweat helps get rid of metabolic waste
4
Q
Functions of skin: communication
A
- sensory receptors in skin send info to brain about pain, touch, pressure, and temperature
5
Q
Layers of skin: epidermis
A
- most superficial
- consists of epithelial cells
- no blood vessels
- deepest portion= stratum basale which undergo division continuously. Older cells pushed to surface which keratinized (gross waxy which water proof surface of skin)
6
Q
Dermis
A
- underneath epidermis
- connective tissue
- blood vessels, sensory receptors, hair follicles, sebaceous glands, sweat glands
7
Q
Subcutaneous layer
A
- not skin
- connective tissue which binds skin to muscle
- helps cushion and insulate body
8
Q
Temperature homeostasis
A
- activation of sweat glands
- receptors in semis of skin communicate with hypothalamus.
- sweat = cooling
- effectors = sweat glands, blood vessels (vasodilation), muscles (shivering- muscular system)
9
Q
Exocrine glands
A
- sebaceous and sweat glands
- secrete substance into ducts
10
Q
Sebaceous glands
A
- secrete sebum, which inhibits water loss from skin and protects
- oily mixture of lipids and proteins
- connected to hair follicles
11
Q
Sweat glands:eccrine
A
- not connects to hair follicle
- activated by elevated body temp
- forehead, neck, back
- secrete sodium chloride, potassium, bicarbonate, glucose, antimicrobial peptides
12
Q
Sweat glands: apocrine
A
- secret oily fatty acids, triglyceride, proteins
- armpits, groin, palms, feet
- stress or anxiety
- smells because bacteria like it
