BIOD 103 MODULE 3 EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS GRADED A++ LATEST UPDATE
Integument
Covering membrane of the body (skin)
Integ/o
To cover
Dermatology
Study of skin and skin disorders
Integumentary accessory structures
Nails, hair, sebaceous glands, sweat glands
Skin
largest organ of the body, >3000 sq in, 6 lbs
Skin function
Protect, regulate temp, sense, secrete
Sweat glands
Secrete sweat: water, salt, other chemicals
Sebaceous glands
Secrete sebum: oily substance that protects skin from dehydration
Skin layers
Epidermis, dermis
Epidermis
,Outer layer of skin, 5 layers
Epidermis layers
Deep: stratum germinativum, stratum spinous, stratum granulosum, stratum lucidum,
and stratum corneum
Melanin
Pigment found in stratum germinativum, gives skin its color
Stratum spinosum
The spiny layer just above the stratum germinativum layer
Langerhans cells
Cells in stratum spinosum that protect skin from microbes
Stratum granulosum and stratum lucidum
Formed of keratin
Keratin
protein that forms hair, nails, and the tough outer layer of skin
Stratum corneum
most superficial layer of the epidermis, consists of dead cells
Dermis
Deep to epidermis, made of connective tissue
Dermis structures
Nerves, blood vessels, sebaceous/sweat glands, elastic fibers, hair follicles, and
lymphatic vessels
Macule
, flat, discolored spot on skin
Ex: mole, birthmark
Wheal
Localized, temporary elevation of skin that is itchy
Ex: uricaria or hives
Papule
Solid, confined, and elevated area on the skin
Ex: pimple
Vesicle
Small, fluid filled sac
Ex: blister
Pustule
Small, elevated, confined lesion filled with pus
Ex: pimple
Ulcer
Erosion of healthy tissue
Fissure
Crack-like slit that extends through epidermis into dermis
Hair
Thin, stringlike structure that develops from hair follicle
Hair root
Embedded in follicle
Hair shaft
COMPLETE SOLUTIONS GRADED A++ LATEST UPDATE
Integument
Covering membrane of the body (skin)
Integ/o
To cover
Dermatology
Study of skin and skin disorders
Integumentary accessory structures
Nails, hair, sebaceous glands, sweat glands
Skin
largest organ of the body, >3000 sq in, 6 lbs
Skin function
Protect, regulate temp, sense, secrete
Sweat glands
Secrete sweat: water, salt, other chemicals
Sebaceous glands
Secrete sebum: oily substance that protects skin from dehydration
Skin layers
Epidermis, dermis
Epidermis
,Outer layer of skin, 5 layers
Epidermis layers
Deep: stratum germinativum, stratum spinous, stratum granulosum, stratum lucidum,
and stratum corneum
Melanin
Pigment found in stratum germinativum, gives skin its color
Stratum spinosum
The spiny layer just above the stratum germinativum layer
Langerhans cells
Cells in stratum spinosum that protect skin from microbes
Stratum granulosum and stratum lucidum
Formed of keratin
Keratin
protein that forms hair, nails, and the tough outer layer of skin
Stratum corneum
most superficial layer of the epidermis, consists of dead cells
Dermis
Deep to epidermis, made of connective tissue
Dermis structures
Nerves, blood vessels, sebaceous/sweat glands, elastic fibers, hair follicles, and
lymphatic vessels
Macule
, flat, discolored spot on skin
Ex: mole, birthmark
Wheal
Localized, temporary elevation of skin that is itchy
Ex: uricaria or hives
Papule
Solid, confined, and elevated area on the skin
Ex: pimple
Vesicle
Small, fluid filled sac
Ex: blister
Pustule
Small, elevated, confined lesion filled with pus
Ex: pimple
Ulcer
Erosion of healthy tissue
Fissure
Crack-like slit that extends through epidermis into dermis
Hair
Thin, stringlike structure that develops from hair follicle
Hair root
Embedded in follicle
Hair shaft
