Podcast
Questions and Answers
Which layer of the skin contains blood vessels?
Which layer of the skin contains blood vessels?
- Dermis (correct)
- Epidermis
- Hypodermis
- Stratum Lucidum
What is the primary role of keratin in the integumentary system?
What is the primary role of keratin in the integumentary system?
- Regulating body temperature through vasodilation
- Facilitating nonverbal communication through facial expressions
- Providing a tough protective barrier against trauma (correct)
- Synthesizing Vitamin D when exposed to UV radiation
How does the integumentary system contribute to thermoregulation?
How does the integumentary system contribute to thermoregulation?
- By synthesizing vitamin D when exposed to UV light
- Through vasodilation/vasoconstriction and perspiration (correct)
- By providing a barrier that prevents water loss
- By releasing natural antibiotics to prevent infection
Which function of the integumentary system protects the body from overcolonization by microbes?
Which function of the integumentary system protects the body from overcolonization by microbes?
What role do glycolipids play in the integumentary system?
What role do glycolipids play in the integumentary system?
Flashcards
Integumentary System
Integumentary System
The body system consisting of skin and accessory organs like hair, nails, and glands.
Epidermis
Epidermis
The outermost layer of skin, made of stratified squamous epithelium, and is avascular.
Dermis
Dermis
The deeper layer of skin made of connective tissue that is vascular and contains nerves, hair follicles, and glands.
Functions of Skin
Functions of Skin
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Thermoregulation
Thermoregulation
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Study Notes
Integumentary System
- Skin and accessory organs (hair, nails, glands) are the body's largest and heaviest organ.
- Skin is highly vulnerable to external forces, radiation, trauma, infection, and chemicals.
- Skin layers: epidermis, dermis, hypodermis.
- Epidermis: Stratified squamous epithelium (avascular).
- Dermis: Deeper connective tissue layer (vascular).
- Hypodermis: Connective tissue layer below dermis, not part of the skin, but associated.
Functions of the Skin
- Resistance to trauma and infection
- Keratin provides tough protection
- Dermcidin and defensins are natural antibiotics, preventing overcolonization by microbes.
- Dendritic cells are immune cells in the epidermis.
- Skin protects from water loss, via keratin and glycolipids.
- UV radiation protection.
- Protects from harmful chemical exposure.
Vitamin D Synthesis
- Skin's initial step in Vitamin D synthesis occurs in the presence of UV light.
- The liver and kidneys complete the Vitamin D synthesis process.
Sensory Functions
- Skin has receptors for temperature, touch, pain, etc.
- Skin regulates temperature, via thermoreceptors.
- Vasodilation/vasoconstriction and perspiration aid in thermoregulation.
Nonverbal Communication
- Skin aids in nonverbal communication.
- Facial expressions are an example.
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