ch 6 hw

The majority of dermis is composed of: -fibrous connective tissue -dense regular connective tissue -stratified squamous epithelium -adipose tissue -dense irregular connective tissue

-dense irregular connective tissue

Chronic exposure to UV rays can damage the ______ in epidermal cells & accelerate aging. -DNA -cytoskeleton -rough endoplasmic reticulum -lysosomes

DNA

Lines of cleavage partition the skin & indicate the predominant direction of underlying elastic fibers in the dermis? TRUE OR FALSE?

False

Which are functions of hair? -absorption of chemical signals -prevents heat loss from the scalp to the air -prevents the scalp from sunburn and injury -associated tactile receptors detect light touch

all of the above

which are functions of the integument -protection from external environment -prevention of water loss -temperature regulation -movement -immune defense

all of the above

which are affected by 3rd degree burns? -epidermis -dermis -subcutaneous layer

all the above

milk and ear wax: -are not secretions -are secreted from modified sweat glands -are secreted from modified sebaceous glands -are in the blood -are synthetic substances

are secreted from modified sweat glands

the subcutaneous layer of skin consists of: -epithelial tissue -areolar and adipose tissue -epithelium and areolar tissue -adipose tissue and skeletal muscle tissue -blood & nerves

areolar and adipose tissue

Contraction of the arrestor pili muscles causes the hair follicle to: -resist contraction -lie at an oblique angle next to the skin -become perpendicular to the skin, resulting in the hair "standing on end" -releases the hair root

become perpendicular to the skin, resulting in the hair "standing on end"

Structures in hair

cuticle, matrix, hair papillae, arrestor pili muscle, hair bulb

Which of the following is normal response to excessive loss of body heat in a cold environment: -dermal blood vessels constrict -sweat glands become active -smooth muscles relax -dermal blood vessels dilate -hairs are retracted into their follicles

dermal blood vessels constrict

The sweat gland that produce a watery substance & are associated w exercise & stress are the ______ sweat glands, while glands that produce organic substance that cause body odor are the _____ sweat glands.

eccocerine sweat glands apocrine sweat glands

Immune cells found in the epidermis are called -epidermal dendritic cells -keratinocytes -melanocytes -adipocytes

epidermal dendritic cells

structures of intugement order:

epidermis, papillary layer, reticular layer, subcutaneous layer

when the body temperature drops below normal, blood vessels dilate TRUE OR FALSE?

false, blood vessels would constrict

the vascular connective tissue that initially forms in a healing wound is -granulation tissue -epidermal tissue -reticular tissue -osseous tissue

granulation tissue

Which is NOT a function of nails? -assist in grasping an object -help us walk properly -protect distal part of finger tips -prevent damage or extensive distortion during jumping, kicking, or catching

help us walk properly is NOT a function of nails

Exposure to UV light darkens skin by stimulating synthesis of: -melatonin -carotene -hemoglobin -cyanin -melanin

melanin

Melanin is produced and stored in: -melanocytes -the basement membrane -the dermis -keratinocytes

melanocytes

layer of epidermis that contains melanocytes in a single row of columnar cells that undergo mitosis is the: -stratum corneum -stratum spinosum -stratum basale -stratum granulosum -stratum melaneum

stratum basale

structures associated w exocrine glands of skin

sweat pore, sebaceous gland, merocrine sweat gland, apocrine sweat gland

Thick or Thin Skin -found on palms of hand -found on soles of feet -doesn't contain hair follicles -contain sebaceous glands -does not include stratum lucidium -contains hair follicles -does not contain hair follicles -found over most of body -contains all 5 epidermal strata

thick skin: found on palms of hands & soles of feet, doesn't contain hair follicles, contains 5 epidermal strata thin skin: contain sebaceous glands, doesn't contain stratum lucidium, contains hair follicles, found over most of body

-made up of multiple layers of dead keratinocytes that regularly exfoliate -present only in palms of hands & soles of feet -presence of dark staining granules; keratinization begins in this layer -toward apical surface; keratinocytes cease cell division; epidermal dendritic cells in this layer -cuboidal/columnar cells contains keratinocytes, melanocytes, tactile cells

-stratum corneum -stratum lucidium -stratum granulosum -stratum spinosum -stratum basale

Carotene is required from yellow/orangish _______? In the body carotene is converted into _______? The black or brown pigment that is produced in response to light exposure is? The amount of melanin in skin _____ partially determined by heredity? Normal skin color is a result of the combination of hemoglobin, melanin, and? The oxygen-binding protein that gives skin its reddish tint is?

-vegetables -Vitamin A -Melanin -is -carotene -hemoglobin

Place in proper category either Basal Cell Carcinoma, Malignant Melanoma, Squamous Cell Carcinoma: -most common type of skin cancer -seldom spreads to other tissues -if it metastasizes, deadliest skin cancer -arises from deepest layer of epidermis -arises from cell that project from UV light -least common skin cancer -raised, reddened, scaly appearance -caused by mutations commonly found in moles

1.) Basal Cell Carcinoma: most common type of skin cancer, seldom to spread to other tissues, arises from deepest layer of epidermis 2.) Malignant Melanoma: if it metastasizes, deadlines skin cancer, arises from cell that projects from UV light, least common skin cancer, caused by mutations commonly found in moles 3.) Squamous Cell Carcinoma: raised, reddened, scaly appearance

match the skin gland with description: 1.) Produce sebum, an oily substance rich in lipids 2.) Consists of eccrine and apocrine glands Options: Sebaceous glands/Sweat glands

1.) Sebaceous glands 2.) Sweat glands

Match structure w protective function: 1.) Protects against abrasion; contains melanin, which absorbs damaging UV light 2.) Protects against abrasion, acts as a heat insulator, protects the eyes against foreign objects 3.) Produce secretions that create an environment unsuitable for some microorganisms 4.) Protects the ends of fingers & toes from damage; can be used in defense Options: Glands, hair, nails, skin

1.) Skin 2.) Hair 3.) Glands 4.) Nails

-middle layer, consists of 3-5 layers of keratinocytes -deepest epidermal layer, tightly attached to underlying basement membrane -most superficial layer, consist of dead, scaly, keratinized cells -2nd deepest layer, known as spiny layer -clear layer, thin translucent region ab 2-3 cell layers thick

1.) stratum granulosum 2.) stratum basale 3.) stratum corneum 4.) stratum spinosum 5.) stratum lucidium

place events that occur during wound healing in correct order: -stratum basale regenerates & CT fibrous occurs -a blood clot forms, & leukocytes enter the wound area -the cut blood vessels bleed into the wound -blood vessels regrow, & granulation tissue forms

1.) the cut blood vessels bleed into the wound 2.) a blood clot forms & leukocytes enter wound area 3.) blood vessels regrow & granulation tissue forms 4.) stratum basale regenerates & CT fibrous occurs

Which is true regarding the subcutaneous layer? -subcutanous is not part of intugement -subcutaneous layer consists of adipose & areolar CT -subcutaneous is avascular -one of the functions of subcutaneous is thermal insulation

All of the above