118 Questions
Which one of the following is NOT an organ of the integumentary system?
Lungs
What is the main function of the integumentary system?
To regulate body temperature
Which layer of the skin provides the initial barrier to the external environment?
Epidermis
What is the approximate percentage of total body weight that the skin accounts for in humans?
12-15%
Which layer of the skin contains connective tissues, vessels, glands, and hair roots?
Dermis
What gives color to the skin?
Melanocytes
Which one of the following is NOT a function of the integumentary system?
Delivering oxygen to cells
What is the attachment site for sensory receptors in the integumentary system?
Dermis
What is the transitional subcutaneous zone made up of?
Loose connective and adipose tissue
What is the basement membrane that separates the epidermis from the dermis made up of?
Basal lamina and reticular lamina
Which layer of the skin is responsible for the formation of the epidermal water barrier?
Stratum corneum
What is the main function of the epidermis?
Protection
Which layer of the skin is composed of dense irregular connective tissue?
Dermis
What is the function of the hypodermis?
Energy storage
Which layer of the skin is responsible for the production of keratin?
Stratum basale
What is the composition of the epidermis?
Stratified squamous epithelial cells
Which layer of the skin is highly vascularized and consists of loose connective tissue?
Dermis
What is the function of the dermis?
Supporting the epidermis
Which layer of the skin is responsible for the flexibility and elasticity of the integument?
Dermis
What is the function of the hypodermis in thermoregulation?
Heat insulation
Which of the following is NOT a function of the skin?
Protect against invasion by infectious organisms
What is the role of the skin in gas exchange for small-bodied invertebrates in aquatic or moist habitats?
It allows gases to diffuse into and out of the interstitial fluid
What is the main purpose of the skin's integumentary exchange system?
To allow gases to diffuse into and out of the interstitial fluid
How does the skin protect the body against sunburns?
By secreting melanin
What is the role of the skin as a receptor?
To sense touch, pressure, pain, heat, and cold
What are some possible diseases and injuries to the human integumentary system?
Formation of new cells to repair minor injuries
What does the skin do to help maintain homeostasis?
Regulate body temperature
What is the function of the skin's stratum germinativum?
To form new cells to repair minor injuries
What is the role of the skin in excreting waste materials?
To excrete waste materials through perspiration
What does the skin do in response to abrupt changes in temperature?
Regulate body temperature
Which one of the following is NOT an appendage of the integumentary system?
Muscles
What is the main function of the hypodermis?
Providing thermal insulation
Which layer of the skin contains nerve endings?
Epidermis
What is the approximate surface area covered by the skin in humans?
1 to 1.5 m2
What is the composition of the basement membrane?
Basal lamina and reticular lamina
Which layer of the skin is responsible for the flexibility and elasticity of the integument?
Dermis
What is the role of the skin in maintaining water balance?
Preventing water loss
Which layer of the skin is highly vascularized?
Dermis
What is the role of the skin as an attachment site for sensory receptors?
Detecting pain
What is the main function of the epidermis?
Maintaining water balance
Which layer of the skin is responsible for the production of lipids that form the epidermal water barrier?
Epidermis
What is the function of the stratum lucidum in the epidermis?
To provide extra protection in thicker areas of the skin
What is the role of the dermis in the integumentary system?
To support the epidermis
Which layer of the skin provides elasticity and flexibility to the integument?
Reticular layer of the dermis
What is the main function of the hypodermis?
To store fats and act as an energy reserve
What is the primary role of the epidermis in the integumentary system?
To provide protection against the outer environment
Which layer of the skin is highly vascularized and consists of loose connective tissue?
Papillary layer of the dermis
What is the function of the hypodermis in thermoregulation?
To act as a heat insulator
What is the approximate percentage of total body weight that the skin accounts for in humans?
15%
What gives color to the skin?
Melanin
What is the primary function of the skin's stratum germinativum?
To form new cells to repair minor injuries
How does the skin protect the body against sunburns?
By secreting melanin
What is the role of the skin as a receptor?
To act as a receptor for touch, pressure, pain, heat, and cold
What is the function of the hypodermis in thermoregulation?
To regulate body temperature
What is the main purpose of the skin's integumentary exchange system?
To facilitate gas exchange
What percentage of total body weight does the skin account for in humans?
Around 10%
What are some possible diseases and injuries to the human integumentary system?
Skin cancer and burns
What is the main function of the epidermis?
To protect against invasion by infectious organisms
What is the function of the dermis?
To provide structural support and flexibility
What is the transitional subcutaneous zone made up of?
Adipose tissue
Which of the following is NOT a function of the integumentary system?
Coordination of immune response to pathogens and cancer cells
What is the role of the skin in maintaining water balance?
Preventing excessive water loss
What is the main function of the dermis?
Nourishment of epidermal cells
Which layer of the skin is responsible for the production of lipids that form the epidermal water barrier?
Stratum Granulosum
What is the approximate percentage of total body weight that the skin accounts for in humans?
15%
What gives color to the skin?
Melanin
Which layer of the skin provides elasticity and flexibility to the integument?
Dermis
Which layer of the skin contains abundant adipocytes and serves as an energy reserve and shock absorber?
Hypodermis
Which body parts have a higher concentration of adipocytes in the hypodermis in men?
Upper neck and upper arms
Which body parts have a higher concentration of adipocytes in the hypodermis in women?
Breast and hips
Which layer of the epidermis is responsible for the production of keratin?
Stratum Granulosum
Which cells in the epidermis are responsible for producing melanin?
Keratinocytes
Which layer of the epidermis contains cells that release their contents by exocytosis, forming a water resistance layer?
Stratum Granulosum
Which cells in the epidermis are responsible for detecting touch?
Merkel Cells
Which layer of the skin nourishes and supports the epidermis?
Superficial papillary layer
Which layer of the skin restricts the spread of pathogens and attaches the skin to deeper tissues?
Deeper reticular layer
Which layer of the skin contains a lot of fat cells (adipocytes)?
Subcutaneous layer
Which layer of the skin contains fibers in an interwoven meshwork of dense irregular connective tissue?
Deeper reticular layer
Which layer of the hair contains relatively soft and flexible keratin?
Medulla
What is the main function of hair follicles?
Produce hairs that protect the skull
Which layer of the hair surrounds the hair root and the deeper portion of the shaft?
Internal root sheath
What is the function of the arrector muscles in relation to hair?
They elevate the hair
Which type of hair is heavy, deeply pigmented, and sometimes curly?
Terminal
What is the normal rate of hair growth on the scalp?
0.33 mm/d
Which type of sweat glands are strongly influenced by hormones and have a possible function in communication?
Apocrine sweat glands
Which type of skin cancer is the least dangerous and is induced by UV rays of the sun?
Basal cell carcinoma
What is the correct order of the layers of the skin, from outermost to innermost?
Epidermis, dermis, hypodermis
What is the function of sebaceous glands in the skin?
Secrete oil lipid (sebum) that coats hair shaft and epidermis
Which of the following is a function of hair follicles?
Produce hairs that protect the skull and provide touch sensations
What is the composition of the medulla in most hairs?
Soft keratin
What is the function of the cuticle in hair?
To coat and protect the outer surface of the hair
Where is the hair papilla located?
At the base of the hair bulb
What is the main component of the hair cortex?
Hard keratin
What is the approximate percentage of hairs on the body that are not on the head?
98%
What is the role of the hair matrix in hair production?
To produce daughter cells that form the developing hair
What is the role of sebaceous glands in relation to hair?
To produce oil that lubricates and conditions the hair
What is the function of sweat glands in relation to hair?
To produce sweat
What is the function of nails in the integumentary system?
To protect the fingertips and enhance touch sensitivity
Which type of sweat glands are limited in distribution and produce an odorous secretion?
Apocrine sweat glands
Which type of sweat glands are widespread and produce thin secretions mostly composed of water?
Merocrine sweat glands
Which type of sweat glands are specialized for milk production and are large, complex apocrine sweat glands?
Ceruminous glands
Which type of sweat glands secrete oil lipid (sebum) that coats the hair shaft and epidermis?
Sebaceous glands
Which type of glands secrete/produce waxy cerumen into the external ear canal?
Ceruminous glands
What is the most deadly type of skin cancer?
Malignant melanoma
Which type of skin cancer is the least dangerous?
Basal cell carcinoma
What is the main cause of skin cancer?
UV rays of the sun
Which layer of the skin is responsible for the production of lipids that coat the hair shaft and epidermis?
Sebaceous glands
What is the term for the excessive growth of hair in women?
Hirsutism
What is the function of the hair root?
To attach the hair to the hair follicle
Which layer of the hair does not extend the entire length of the follicle?
Internal root sheath
What is the function of the external root sheath?
To extend from the skin surface to the hair matrix
What is the function of the glassy membrane?
To act as a thickened basal lamina wrapped in dense connective tissue sheath
What is the function of the arrector muscles?
To elevate the hair when stimulated
What is the function of scalp hair?
To provide insulation for the skull
What is the function of beard, pubic, and axillary hair?
To indicate sexual maturity and help distribute sexual scents
What is the function of guard hairs/vibrissae and eyelashes?
To prevent foreign objects from getting into nostrils, ear canals, or eyes
What is the function of hair in expressions of emotions with eyebrows?
To express emotions with eyebrows
What are the three types of hairs?
Vellus, intermediate, terminal
Test your knowledge of the integumentary system and its various components! From skin to hair, scales to feathers, and everything in between, this quiz will challenge your understanding of the body's outermost layer. Dive into the world of the integumentary system and discover its vital role in protecting and maintaining animal bodies.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
