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Which of the following is a characteristic of the epidermis?
a)is well vascularized
b)contains fat stored in adipose tissue
c)contains collagen fibers
d)consists of keratinized stratified squamous epithelium
a)is well vascularized
b)contains fat stored in adipose tissue
c)contains collagen fibers
d)consists of keratinized stratified squamous epithelium
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Question
The most superficial component of the skin is the:
a)dermis
b)hypodermis
c)loose connective tissue
d)epidermis
a)dermis
b)hypodermis
c)loose connective tissue
d)epidermis
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Chap 5- Int. System
Chapter 5- skin
| Question | Answer |
|---|---|
| Which of the following is a characteristic of the epidermis? a)is well vascularized b)contains fat stored in adipose tissue c)contains collagen fibers d)consists of keratinized stratified squamous epithelium | d)consists of keratinized stratified squamous epithelium |
| The most superficial component of the skin is the: a)dermis b)hypodermis c)loose connective tissue d)epidermis | d)epidermis |
| Tommy fell and skinned his knee. The scrape did not bleed. He must have only damaged the a)subcutaneous layer b)hypodermis c)epidermis d)dermis | c) epidermis |
| the epidermis is: a)keratinized cutaneous membrane b)nonkeratinized cutaneous membrane c)nonkeratinized mucous membrane d)keratinized mucous membrane | a) keratinized cutaneous membrane |
| How do nutrients reach the epidermis of the skin? a)through vesicles b)transport pumps c)diffusion from blood vessels in the dermis to the epidermis d)blood vessels carry nutrients directly into the epidermis. | c)Diffusion transports nutrients from blood vessels in the dermis into the epidermis. |
| Which describes the effector response of sweat glands and blood vessels? a)glands stop releasing sweat; vessels constrict. b)glands stop releasing sweat; vessels dilate. c)glands release sweat; vessels dilate d)glands release sweat; vessels constrict. | c) sweat glands release sweat and blood vessel dilate |
| The region of skin that provides a tough barrier against pathogens and trauma is the a)subcutaneous layer b)hypodermis c)dermis d)epidermis | d)epidermis |
| Under what conditions would the skin produce sweat and experience cutaneous vasodilation? a)upon exposure to UV radiation b)upon decrease in body temperature c)upon increase in body temperature d)due to lack of oxygen | c)upon increase in body temperature |
| Which of the following is an appropriate skin response to cold? a)dermal blood vessels vasodilator b)sebaceous gland secretions increase c) dermal blood vessels vasoconstrict d)vitamin D production increases | c)dermal blood vessels vasoconstrict |
| Why is vitamin D necessary? a)Vitamin D protects the skin from UV radiation. b)Vitamin D critical for thermoregulation. c)Vitamin D is required for calcium absorption from the small intestine. d)Vitamin D protects the skin from pathogens. | c)vitamin D is required for calcium absorption from the small intestine |
| T/F: Thermoreceptors detect temperature change in the skin and internal body fluids. | true |
| Dividing stem cells that give rise to keratinocytes are located in the a)stratum corneum b)stratum basale c)stratum granulosum d)stratum lucidum | b)stratum basale |
| A splinter penetrated into the skin. The splinter nearly reached stratum basale of the epidermis. What is the final layer injured by this splinter? a)stratum granulosum b)stratum lucidum c)stratum corneum d)stratum spinosum | d)stratum spinosum of the epidermis |
| What type of cell junction bands together adjacent cells, making the epidermis stronger? a)desmosome b)occluding junction c)tight junction d)gap junction | a)desmosome |
| The most numerous cells of the epidermis are the a)melanocytes b)dendritic cells c)keratinocytes d)Merkel cell | c)keratinocytes |
| Jill is blind and often uses braille to read her school assignments. What cell in the stratum basale of the epidermis helps her discriminate between the textured dots? a)dendritic (Langerhans) cell b)keratinocyte c)Merkel cell d)melanocyte | c)Merkel cell |
| Skin without keratin would be more likely to: a)tear upon being mechanically stressed. b)burn upon exposure to the sun. c)lose the sensation of touch. d)be unable to thermoregulate. | a)tear upon being mechanically stressed |
| Predict which of the following regions of the body will have predominantly thick skin. a)palms b)lips c)arms d)eyelids | a)palms |
| A callus may develop when both thin and thick skin are subjected to repeated pressure. Which layer of the epidermis develops the callus? a)stratum corneum b)stratum basale c)stratum spinosum d)stratum lucidum | a)stratum corneum |
| What tissue composes the reticular layer of the dermis? a)dense irregular b)dense regular c)hyaline d)loose connective | a)dense irregular |
| Where are blood vessels housed that nourish the epidermis? a)stratum basale of the epidermis b)the reticular layer of the dermis c)lamellated (Pacinian) corpuscles d)dermal papillae | d)dermal papillae |
| What is the pigment that protects the DNA of keratinocytes from mutations induced by UV radiation? a)albinism b)melanin c)carotene d)hemoglobin | b)melanin |
| Which of the following is NOT a skin pigment? a)hemoglobin b)melanin c)carotene d)keratin | d)keratin |
| Exposure to UV radiation causes the skin to darken by increasing the production of: a)collagen b)melanin c)keratin d)hemoglobin | b)melanin |
| T/F: Vesicles known as melanosomes are taken into the cytosol of keratinocytes by endocytosis. The melanosome is transported to the superficial side of the keratinocyte to shield its nucleus. | true |
| Exercise often makes the skin flush red, a condition known as: a)jaundice b)pallor c)cyanosis d)erythema | d)erythema |
| What does cyanosis signify? a)A person has been kept out of the sun. b)A person has been exposed to cyanide. c)A person has oxygen-starved skin. d)A person has been exposed to too much sun. | c) a person has oxygen-starved skin |
| What do vellus hairs lack? a)cuticle b)pigment c)keratin d)cortex | b)pigment |
| What do dead keratinized cells form? a)hair bulb b)hair shaft c)arrector pili muscle d)hair root | b)hair shaft |
| Glands that release sweat into hair follicles are called a)eccrine sweat glands b)apocrine sweat glands c)sebaceous glands d)mammary glands | b)apocrine sweat glands |
| An oily secretion that coats and conditions the skin and hair is secreted by the a)sebaceous glands b)eccrine sweat glands c)mammary glands d)ceruminous glands | a)sebaceous glands |
| Mammary glands are specialized a)sweat glands b)holocrine glands c)ceruminous glands d)sebaceous glands | a)sweat glands |
| Eccrine glands produce a)hormones b)sebum c)sweat containing mostly water d)cerumen | c)sweat containing mostly water |
| Which type of sensory receptor in Laura's skin will respond to a doctor lightly touching her foot? a)Tactile (Meissner's) corpuscles in the dermis b)Pacinian corpuscles in the epidermis c)Dendritic cells in the epidermis d)Merkel cells in the dermis | a)Tactile (Meissner's) corpuscles in the dermis |
| The most superficial component of the skin is the a)hypodermis b)dermis c)epidermis d)loose connective tissue | c)epidermis |
| Why is vitamin D necessary? a)for calcium absorption from the small intestine b) for thermoregulation c)protects the skin from UV radiation d)protects the skin from pathogens | Vitamin D is required for calcium absorption from the small intestine. |
| what is a gland that contributes to thermoregulation? | sweat gland |
| what is a gland that produces a moist, hydrophobic secretion? | sebaceous gland |
| What is the most numerous cell type in the epidermis? a)keratinocyte b)dendritic (Langerhans) cell c)merkel cell d)melanocyte | keratinocyte |
| All cells in the epidermis arise from mitotic activity in stratum a)granulosum b)corneum c)basale d)lucidum | basale |
| Thick skin lacks a)stratum granulosum b)sweat glands c)stratum lucidum d)hair follicles | hair follicles |
| The most superficial layer of the dermis is the a)reticular layer b)papillary layer c)hypodermis d)stratum basale | papillary layer |
| We have unique patterns on our fingers, toes, palms, and soles created by a)Merkel cells b)dendritic (Langerhans) cells c)cleavage lines d)epidermal ridges | epidermal ridges |
| T/F: The papillary layer of the dermis consists of loose connective tissue that is built for warmth and insulation. | false |
| Melanin is produced upon exposure to a)cold b)heat c)UV radiation d)wind | UV radiation |
| What does cyanosis signify a)A person has been exposed to too much sun. b)A person has been kept out of the sun c)A person has oxygen-starved skin. d) A person has been exposed to cyanide. | a person has oxygen-starved skin |
| T/F: Carotene and hemoglobin are two minor skin pigments that contribute to skin color. | true |
| The nail body covers the a)cuticle b)lunula c)nail root d)nail bed | nail bed |
| What stimulates the secretion of sebum? a)sex hormones b)UV radiation c)high temperatures d)low temperatures | sex hormones |
| The rule of nines is used to estimate the percentage of body surface area affected by a)burns b)melanin c)malignant melanoma d)basal cell carcinoma | burns |
| Squamous cell carcinoma arises from a)keratinocytes in stratum spinosum b) keratinocytes in stratum basale c)keratinocytes in stratum corneum d)melanocytes | keratinocytes in stratum spinosum |
| T/F: The ABCDE rule divides the body into 11 areas, each representing 9% of the total body surface area to estimate the percent of the body affected by burns. | false |
| The main components of the skin are the a)epidermis and dermis b)dermis and hypodermis c)epidermis, dermis, hypodermis, and the subcutaneous layer d)epidermis, dermis, and hypodermis | epidermis and dermis |
| Which of the following is NOT a function of the skin? a)thermoregulation b)Vitamin A synthesis c)protection d)sensation | vitamin A synthesis |
| Which sensation is NOT detected by the skin? a)light touch b)equilibrium c)temperature d)texture | equilibrium |
| Which layer of the epidermis is characterized by prominent cytoplasmic granules in the cells? a)stratum granulosum b)stratum corneum c)stratum spinosum d)stratum lucidum | stratum granulosum |
| Thin skin lacks stratum a)corneum b)lucidum c)granulosum d)spinosum | lucidum |
| Where are blood vessels housed that nourish the epidermis? a)lamellated (Pacinian) corpuscles b)dermal papillae c)stratum basale of the epidermis d)the reticular layer of the dermis | dermal papillae |
| Which of the following cells is associated with the dermis? a)keratinocyte b)dendritic (Langerhans) cell c)melanocyte d)fibroblast | fibroblast |
| Which of the following is a yellow-orange skin pigment? a)melanin b)hemoglobin c)cyanide d)carotene | carotene |
| What stands hairs on end, causing piloerection? a)epidermal ridges b)arrector pili muscle c)dermal papillae d)epithelial root sheath | arrector pili muscle |
| The cuticle around a nail is the a)hyponychium b)perinychium c)eponychium d)lunula | eponychium |
| Eccrine glands produce a)sweat containing mostly water b)cerumen c)hormones d)sebum | sweat containing mostly water |
| Humans often purchase antiperspirants and deodorants to suppress and mask the odors of secretions from the a)mammary glands b)sebaceous glands c)eccrine glands d)apocrine glands | apocrine glands |
Created by:
carriewest