Questions and Answers
What is the main reason why infants and elderly people are more sensitive to cold?
They have less subcutaneous fat
What is the primary site of injection for a subcutaneous injection?
Fatty tissues just beneath the skin
What is the main function of the dermis?
To provide mechanical support
What is the hypodermis composed of?
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What is the primary function of the subcutaneous tissue?
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What is the primary function of the dermis?
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What is the term for the condition characterized by a yellowish discoloration of the skin?
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Which of the following is NOT a component of the hypodermis?
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Which of the following structures controls thermoregulatory networks?
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What is the main function of the subcutaneous tissue?
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What is the term for a collection of blood outside of blood vessels?
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What is the term for the condition where the blood vessels in the fingers and toes constrict in response to cold temperatures?
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What is the term for the injection of medication into the subcutaneous tissue?
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Which of the following is a characteristic of the hypodermis?
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Which of the following tissues is the epidermis classified as?
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What is the primary function of the hypodermis?
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What type of tissue can be found in the hypodermis?
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What is the main component of subcutaneous fat in the hypodermis?
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What is the function of subcutaneous fat in the hypodermis?
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Which of the following statements is true about the hypodermis?
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What is the difference in subcutaneous fat thickness between women and men?
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Which of the following regions has relatively abundant subcutaneous fat?
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Study Notes
Integumentary System
- The integumentary system consists of the epidermis, dermis, and hypodermis (also known as subcutaneous tissue)
- The epidermis is epithelial tissue
- The dermis is connective tissue
- The hypodermis is connective tissue, composed of fibroblasts, adipocytes, and macrophages, with a matrix of collagen and elastin
Hypodermis
- The hypodermis is a layer of connective tissue beneath the skin
- It pads the body and binds the skin to underlying tissues
- The hypodermis has more areolar and adipose tissue compared to the dermis
- Subcutaneous fat in the hypodermis serves as an energy reservoir, provides thermal insulation, and is compressible, protecting deeper tissue by absorbing pressure and blows
Subcutaneous Fat
- Subcutaneous fat is composed predominantly of adipose tissue
- It is not uniformly distributed in the body, with more in the abdomen, hips, thighs, and female breasts
- Subcutaneous fat is thicker in women than in men (average 8%) and varies with age
- Infants and elderly people have less subcutaneous fat, making them more sensitive to cold
Clinical Concepts
- Subcutaneous injections are administered into the fatty tissue just beneath the skin
- Skin wound healing is a complex process that involves multiple stages and factors
Skin Conditions
- Jaundice, erythema, cyanosis, albinism, pallor, and haematoma are all skin conditions with distinct characteristics and causes
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