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Questions and Answers
Which cells release heparin and histamine when needed?
What is the function of synovial fluid?
Where is collagen found within the connective tissue?
Which layer of the skin is avascular?
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What is the function of the dermis?
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Which layer of the skin lies beneath the dermis?
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What do mast cells detect and respond to?
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What is the function of collagen in connective tissues?
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What is the function of synovial fluid in joints?
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Which layer of the skin is responsible for making and distributing sweat and sebum?
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Which layer of the epidermis is composed of rough, flakelike dead cells that protect the skin?
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Which layer of the epidermis is absent in thin skin?
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Which layer of the epidermis contains 2-5 layers of flat dead cells filled with keratohyalin granules?
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Which layer of the epidermis is composed of 8-10 layers of cells pulled together by desmosomes?
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Which layer of the epidermis is the base layer and responsible for new cell production?
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Which type of sweat gland is composed of water, salts, and wastes, and responds to environmental changes?
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Which type of sweat gland responds to emotional stress and is found in genital areas and axilla, with hair follicles?
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What does sebum do for the hair and skin?
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Where are melanocytes found in the epidermis?
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What is the role of melanocytes in the skin?
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Study Notes
Cells and Their Functions
- Mast Cells: Release heparin and histamine in response to infections or injuries.
- Synovial Fluid: Lubricates joints, reduces friction, and nourishes cartilage.
- Collagen: Found in connective tissue, providing strength and structure.
Skin Layers and Characteristics
- Avascular Layer: The epidermis, which lacks blood vessels.
- Dermis Function: Provides structural support, elasticity, and houses blood vessels, nerves, and accessory structures.
- Layer Beneath Dermis: The hypodermis (subcutaneous layer) anchors the skin to underlying tissues.
Epidermis Details
- Mast Cell Functions: Detect and respond to allergens, pathogens, and tissue damage.
- Collagen in Connective Tissues: Offers tensile strength and acts as a framework for tissue support.
- Synovial Fluid in Joints: Maintains joint health by lubricating surfaces and acting as a shock absorber.
Sweat Glands and Skin Functions
- Sweat Gland (Eccrine): Composed of water, salts, and wastes, generally responsive to temperature and environmental changes.
- Apocrine Sweat Gland: Activated by emotional stress, located in axillary and genital areas, often associated with hair follicles.
- Sebum Function: Moisturizes hair and skin, enhancing hydration and creating a protective barrier.
Epidermis Composition
- Rough, Flakelike Cells: Located in the stratum corneum; consists of dead cells that provide protection.
- Absent Layer in Thin Skin: Stratum lucidum is only present in thick skin.
- Keratohyalin Granules: Found in the stratum granulosum, containing 2-5 layers of flat dead cells.
- Cells Joined by Desmosomes: The stratum spinosum composed of 8-10 layers contributing to skin strength.
- Base Layer for Cell Production: The stratum basale, responsible for generating new skin cells.
Melanocytes
- Location in Epidermis: Found in the stratum basale.
- Role in Skin: Produce melanin, which protects skin from UV radiation and contributes to pigmentation.
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Description
Test your knowledge on mast cells, synovial fluid, collagen, and the layers of the skin with this quiz. Learn about their functions, locations, and importance in the body.
