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Freckles are the result of


A) melanocyte number and genetic inheritance.
B) melanocyte number and sun exposure.
C) melanocyte activity,genetic inheritance,and sun exposure.
D) melanocyte number,genetic inheritance,and diet.
E) melanocyte activity and diet.

F) None of the above
G) A) and E)

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Epidermal dendritic (Langerhans) cells function as part of the ______ response.


A) immune
B) sensory
C) tanning
D) heating
E) sweating

F) A) and E)
G) C) and E)

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During aging of the integumentary system,sweat production increases as a result of improved sweat gland activity.

A) True
B) False

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Apocrine sweat glands secrete sweat by having the apical portion of epithelial cells pinch off.

A) True
B) False

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During the fetal period,sebum from the sebaceous glands mixes with the cells of the sloughed off periderm to form the vernix caseosa.

A) True
B) False

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What type of epithelium is found in the epidermis


A) Keratinized stratified squamous
B) Nonkeratinized stratified squamous
C) Keratinized stratified cuboidal
D) Nonkeratinized stratitified cuboidal
E) Transitional

F) B) and C)
G) B) and E)

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The ability of the components of the integumentary system to respond to stress or trauma is independent of nervous or endocrine system control.

A) True
B) False

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Sensory receptors in the dermis detect touch,temperature,and light.

A) True
B) False

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When exposed to ultraviolet light,keratinocytes convert a steroid precursor into ________,a molecule that is crucial for regulation of calcium levels.


A) calcitriol
B) cholecalciferol
C) calcitonin
D) creatine
E) phosphorus

F) A) and E)
G) A) and C)

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Cerumen is a secretion that


A) lubricates vellus hairs and waterproofs the skin of the limbs.
B) lubricates the ear canal and traps debris before it reaches the eardrum.
C) cools the body through water evaporation.
D) tends to cause acne on the skin of the face.
E) acts as a pheremone.

F) B) and D)
G) A) and E)

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What is the greatest risk factor for skin cancer


A) Exposure to UV light rays
B) Advanced age
C) Being a female
D) Low skin hydration levels
E) Using excessive sun block

F) A) and D)
G) All of the above

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Sweat gland secretion occurs in response to stimulation by the _______ division of the nervous system.

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One of the main dangers of burns is


A) dehydration,as water can escape from the body.
B) hyperthermia,as temperture regulation is very compromised.
C) hypocalcemia,as blood ion levels are dramatically altered.
D) respiratory infection,as body defenses are concentrated superficially.

E) C) and D)
F) A) and C)

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Sebum has bactericidal properties.

A) True
B) False

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Normally,skin color results from a combination of A: melanin B: hemoglobin C: bilirubin D: carotene


A) a,b,d
B) a,c,d
C) a,d
D) a,b,c
E) b,c,d

F) A) and E)
G) B) and E)

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What types of stimuli are detected by the skin's sensory receptors

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The book mentions pressure,vib...

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The structure responsible for pulling on the follicle and causing "goose bumps" is the


A) external root sheath.
B) internal root sheath.
C) epithelial root sheath.
D) arrector pili muscle.
E) papilla.

F) C) and D)
G) A) and E)

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The cells that contract and squeeze sweat glands causing them to discharge their accumulated secretions are called __________ cells.

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Collagen fibers impart tensile strength to our skin while ______ fibers allow for some stretch and contraction in the dermis during movement.

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Drugs that are administered by skin patches tend to be _______ soluble molecules that are absorbed ________.


A) lipid;slowly
B) lipid;quickly
C) water;slowly
D) water;quickly

E) B) and D)
F) B) and C)

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