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Questions and Answers
Which of the following is NOT a function of the skin?
Which of the following is NOT a function of the skin?
- Absorption of some lipid soluble material
- Excretion of excess water (correct)
- Regulation of body temperature
- Protection against injury
What is the approximate weight of the integument (skin and its appendages) in a person weighing 70 kg?
What is the approximate weight of the integument (skin and its appendages) in a person weighing 70 kg?
- 3 kg
- 4 kg (correct)
- 2 kg
- 1 kg
In terms of thickness, the skin generally ranges between:
In terms of thickness, the skin generally ranges between:
- 3 - 5 mm (correct)
- 0.1 - 0.5 mm
- 1 - 2 mm
- 2 - 3 mm
Which of the following is responsible for the regulation of body temperature?
Which of the following is responsible for the regulation of body temperature?
The skin is continuous with the mucous membranes of which of the following systems?
The skin is continuous with the mucous membranes of which of the following systems?
Which of the following is NOT a component of the integument?
Which of the following is NOT a component of the integument?
What is the main function of sebaceous glands in the skin?
What is the main function of sebaceous glands in the skin?
What is the primary function of sweat glands in the skin?
What is the primary function of sweat glands in the skin?
The color of the skin depends on:
The color of the skin depends on:
What is the main function of nails in the integumentary system?
What is the main function of nails in the integumentary system?
What is the approximate surface area of the skin in a person weighing 70 kg?
What is the approximate surface area of the skin in a person weighing 70 kg?
What is excreted from the sweat glands in addition to sweat?
What is excreted from the sweat glands in addition to sweat?
Which layer of the skin is primarily composed of irregular dense connective tissue?
Which layer of the skin is primarily composed of irregular dense connective tissue?
Which type of sweat glands are found only in specific areas such as axilla and anal region?
Which type of sweat glands are found only in specific areas such as axilla and anal region?
What is the primary function of arrector pili muscles?
What is the primary function of arrector pili muscles?
Which skin layer is present only in thick skin that covers the palms and soles?
Which skin layer is present only in thick skin that covers the palms and soles?
What is the primary function of sebaceous glands?
What is the primary function of sebaceous glands?
In which layer of the epidermis do cells still have nuclei?
In which layer of the epidermis do cells still have nuclei?
Where are apocrine sweat glands primarily found?
Where are apocrine sweat glands primarily found?
Which layer of the skin is known for its function as a water barrier to prevent water loss?
Which layer of the skin is known for its function as a water barrier to prevent water loss?
Where are eccrine sweat glands found throughout the body except for specific areas?
Where are eccrine sweat glands found throughout the body except for specific areas?
Which layer of the skin primarily consists of loose connective tissue containing varying amounts of fat?
Which layer of the skin primarily consists of loose connective tissue containing varying amounts of fat?
What is the primary function of langerhans cells in the epidermis?
What is the primary function of langerhans cells in the epidermis?
What is the approximate weight of the integument (skin and its appendages) in a person weighing 70 kg?
What is the approximate weight of the integument (skin and its appendages) in a person weighing 70 kg?
In which layer of the skin are the sebaceous, eccrine, and apocrine sweat glands located?
In which layer of the skin are the sebaceous, eccrine, and apocrine sweat glands located?
Which of the following functions is NOT associated with the skin?
Which of the following functions is NOT associated with the skin?
What is the primary function of arrector pili muscles in the integumentary system?
What is the primary function of arrector pili muscles in the integumentary system?
At which body regions are apocrine sweat glands primarily found?
At which body regions are apocrine sweat glands primarily found?
What is excreted from the sweat glands in addition to sweat?
What is excreted from the sweat glands in addition to sweat?
What is the primary function of nails in the integumentary system?
What is the primary function of nails in the integumentary system?
Which skin layer is responsible for preventing water loss and acting as a barrier?
Which skin layer is responsible for preventing water loss and acting as a barrier?
What is the approximate surface area of the skin in a person weighing 70 kg?
What is the approximate surface area of the skin in a person weighing 70 kg?
Where are eccrine sweat glands found throughout the body except for specific areas?
Where are eccrine sweat glands found throughout the body except for specific areas?
What is the main function of Merkel cells in the skin?
What is the main function of Merkel cells in the skin?
Which layer of the epidermis is known for its function as a water barrier to prevent water loss?
Which layer of the epidermis is known for its function as a water barrier to prevent water loss?
Where are apocrine sweat glands primarily found?
Where are apocrine sweat glands primarily found?
What is the primary function of Langerhans cells in the epidermis?
What is the primary function of Langerhans cells in the epidermis?
In terms of thickness, how does thick skin differ from thin skin?
In terms of thickness, how does thick skin differ from thin skin?
What is the primary function of sebaceous glands in the skin?
What is the primary function of sebaceous glands in the skin?
What is excreted from the sweat glands in addition to sweat?
What is excreted from the sweat glands in addition to sweat?
Which of the following is NOT a component of the integument?
Which of the following is NOT a component of the integument?
What is the primary function of sweat glands in the skin?
What is the primary function of sweat glands in the skin?
The color of the skin depends on:
The color of the skin depends on:
Study Notes
Skin Functions and Components
- Key functions of skin include protection, temperature regulation, sensation, and excretion.
- Components of the integument include skin, hair, nails, and glands, with sebaceous and sweat glands being vital.
- NOT a function of skin: blood production.
Skin Weight and Surface Area
- In a person weighing 70 kg, the approximate weight of the integument (skin and appendages) is about 4-5 kg.
- The skin's approximate surface area for a 70 kg individual is around 1.8 square meters.
Skin Thickness
- Skin thickness generally ranges between 1-4 mm, with thick skin (palms, soles) being significantly thicker than thin skin.
Temperature Regulation
- The skin assists in body temperature regulation through sweat production and the dilation of blood vessels.
Connection to Mucous Membrane
- Skin is continuous with the mucous membranes of the digestive, respiratory, and urogenital systems.
Sebaceous and Sweat Glands
- Primary function of sebaceous glands is to produce sebum, which lubricates and waterproofs the skin.
- Sweat glands primarily serve to regulate body temperature through perspiration and excrete waste like urea, salts, and water.
Skin Coloration
- Skin color is determined by melanin production, blood flow, and the thickness of the stratum corneum.
Nails and Integumentary System
- The primary function of nails is to protect distal phalanx and enhance fine motor movements.
Sweat Gland Types and Locations
- Eccrine sweat glands are found widely across the body; apocrine glands are located in specific areas like axillae and the anal region.
- Apocrine sweat glands are primarily found in areas such as the armpits and groin.
Skin Layers and Functions
- Dermis is primarily composed of irregular dense connective tissue; the epidermis consists of several layers, where cells have varying states of nuclei presence and functionality.
- The layer responsible for forming a barrier and preventing water loss is the stratum corneum.
Special Cell Functions
- Langerhans cells in the epidermis function as immune responders.
- Merkel cells are involved in the sensation of touch.
Arrector Pili Muscles
- Primary function of arrector pili muscles is to cause hair follicles to stand upright ("goosebumps") and assist in thermoregulation.
Distinction of Skin Types
- Thick skin includes a unique layer known as the stratum lucidum, absent in thin skin.
Excretion from Sweat Glands
- In addition to sweat, glands also excrete salts, urea, and other metabolic waste products.
Summary of Notable Points
- NOT a component of the integument: connective tissues (like bone).
- Thick skin differs from thin skin in terms of added layers and thickness.
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Description
Test your knowledge on the layers and cells of the epidermis, histological structure of the dermis, histophysiology of the skin, skin appendages, and the structural components of sebaceous, eccrine and apocrine sweat glands, hairs, hair follicles, and nails.
