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Questions and Answers
What is the function of Pacinian corpuscles?
Which dermal structure is responsible for producing two types of proteins - collagen and elastin?
What is the main function of Meissner's corpuscle in the dermis?
Which of the following is NOT an accessory structure of the skin?
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Which type of gland is responsible for producing and secreting products through ducts in the dermis?
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In which layer of the skin are Pacinian corpuscles typically found?
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Which layer of the skin contains hair follicles and sweat glands?
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Which of the following is a function of the dermal receptors?
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Which of the following cutaneous glands produces sebum?
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Which layer of the hair is known as the 'living layer'?
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Which of the following is not a function of the integumentary system?
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Which gland is responsible for the production of earwax?
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Which pigment is synthesized by melanocytes?
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Which layer of the skin is composed of stratified, squamous, keratinized epithelial cells held together by desmosomes?
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What is the function of desmosomes in the skin?
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Which pigment contributes to the yellow color of the skin?
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Which layer of the skin contains the hair follicles and sweat glands?
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Which protein is the main component of the outermost layer of the skin?
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Study Notes
Integumentary System
- Made up of skin and its appendages (hair, nails, sebaceous, ceruminous, and sweat glands)
- Performs multiple functions, including temperature regulation, protection, cutaneous sensation, excretion/absorption, and metabolic functions
Temperature Regulation
- Maintains normal temperature of 36.5-37.5°C
- Aids in body heat loss and retention
Protection
- Body's first line of defense
- Protects deeper tissues from mechanical, chemical, bacterial damage, and UV radiation
- Protects against thermal damage and desiccation
Cutaneous Sensation
- Receptor sites in skin sense changes in temperature and pressure
Secretion
- Sebum has anti-fungal and anti-bacterial properties
- Sweat contains waste products like urea, uric acid, and amino acid
Excretion
- Excretes water, sodium, chloride, ammonia, urea, and uric acid
Metabolic Functions
- Produces vitamin D, a fat-soluble vitamin produced by skin when exposed to UV light
- Involved in wound healing and maintaining homeostasis
Structures in the Dermis
- Papillae: superficial edges of dermis, forming individual-specific patterns of ridges in palm and sole (fingerprints)
- Fibers: dermis changes from loose/areolar to dense irregular connective tissue with depth, characterized by cells and fibers in a matrix
- Nerve Endings: serve as receptors (warm, cold, pain, and pressure)
- Cutaneous Glands: exocrine glands located in dermis, producing and secreting products to different body locations through ducts
Accessory Structures of the Skin
- Hair
- Nails
- Skin Glands:
- Sebaceous Glands
- Sweat Glands
- Ceruminous Glands
Skin Color
- Melanin: synthesized by melanocytes, protects skin from UV rays
- Carotene: lipochrome that adds yellow color to the skin, stimulates fibroblasts to synthesize collagen and elastin
- Hemoglobin: iron-containing protein pigment of blood
Skin Layers
- Epidermis: outermost layer, composed of stratified, squamous, keratinized epithelial cells held together by desmosomes
- Dermis (Corium): true skin, consists of dense irregular connective tissue containing collagen and elastic fibers
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Description
Test your knowledge on the functions of the integumentary system which is made up of the skin and its appendages like hair, nails, and glands. Learn about its role in temperature regulation, protection, sensation, excretion, absorption, and maintaining body homeostasis.
