ch.5 (mastering a&p)

29 terms by andreyadesousa

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Which of the following is not a layer of the epidermis?

a) Stratum granulosum
b) Stratum corneum
c) Papillary layer
d) Stratum lucidum

c) Papillary layer

Which of the following is incorrectly paired?

a) Melanin: provides protection against UV radiation
b) Keratinocytes: produce a fibrous protein to protect the epidermis
c) Langerhans cells: activate the immune system
d) Tactile cells: anchor the skin to the body

d) Tactile cells: anchor the skin to the body

Earwax is made by _________________

a) sebaceous glands.
b) ceruminous glands.
c) keratinocytes.
d) sudoriferous glands.

b) ceruminous glands.

Sweat is secreted by:

a) sudoriferous glands.
b) ceruminous glands.
c) mammary glands.
d) sebaceous glands.

a) sudoriferous glands.

Which layer of the epidermis is responsible for regenerating the most superficial layers?

a) stratum granulosum
b) stratum basale
c) stratum corneum
d) stratum spinosum

b) stratum basale

What layer of the dermis is directly below the epidermis?

papillary layer

Which skin pigment is made in the skin itself?

a) keratin
b) melanin
c) carotene
d) hemoglobin

b) melanin

Which of the following represents a difference between eccrine sweat glands and apocrine sweat glands?

a) Eccrine sweat glands are located deeper in the dermis than apocrine sweat glands.
b) Eccrine sweat glands use exocytosis to make secretions, while apocrine sweat glands do not.
c) Eccrine sweat glands begin to function at puberty, while apocrine sweat glands function throughout life.
d) The secretions of apocrine sweat glands contain more fat and protein than do the secretions of eccrine glands.

d) The secretions of apocrine sweat glands contain more fat and protein than do the secretions of eccrine glands.

The skin consists of three main regions. From deep to superficial they are the:

hypodermis, dermis, epidermis

Which skin appendages aid in cooling the skin when the body temperature or the external environmental temperature is high?

eccrine sweat glands

Sam is so cold that he has "goose bumps." What causes goose bumps?

a) skin folds at the papillary region of the dermis
b) hypodermal activity
c) arrector pili muscles pulling hair follicles into an upright position
d) skin folds in the reticular layer of the dermis

c) arrector pili muscles pulling hair follicles into an upright position

Which of the following is a metabolic function of skin?

a) cutaneous sensation
b) protection
c) synthesis of a vitamin D precursor
d) body temperature regulation

c) synthesis of a vitamin D precursor

What layer(s) of the skin is (are) damaged in a second-degree burn?

a) The epidermis and the deepest portions of the dermis are damaged.
b) Only the epidermis is damaged.
c) The epidermis and the superficial regions of the dermis are damaged.
d) Only the dermis is damaged.

c) The epidermis and the superficial regions of the dermis are damaged.

A needle would pierce the epidermal layers of the forearm in which order?

a) basale, spinosum, granulosum, lucidum, corneum
b) granulosum, basale, spinosum, corneum
c) basale, spinosum, granulosum, corneum
d) corneum, granulosum, spinosum, basale

d) corneum, granulosum, spinosum, basale

The dermis ________.

a) has two layers
b) is an avascular connective tissue layer
c) is where melanocytes are found
d) lacks sensory corpuscles and glands

a) has two layers

Nutrients reach the surface of the skin (epidermis) through the process of ________.

a) utilizing the products of merocrine glands to nourish the epidermis
b) filtration
c) absorbing materials applied to the surface layer of the skin
d) diffusing through the tissue fluid from blood vessels in the dermis

d) diffusing through the tissue fluid from blood vessels in the dermis

Melanocytes and keratinocytes work together in protecting the skin from UV damage when keratinocytes ________.

a) provide the melanocyte with a protective shield against abrasion
b) accumulate the melanin granules on their superficial portion, forming a UV-blocking pigment layer
c) maintain the appropriate temperature so the product of the melanocyte will not denature
d) maintain the appropriate pH in order for the melanocyte to synthesize melanin granules

b) accumulate the melanin granules on their superficial portion, forming a UV-blocking pigment layer

The design of a person's epidermal ridges is determined by the manner in which the papillae rest upon the dermal ridges to produce the specific pattern known as handprints, footprints, and fingerprints. Which of the following statements is true regarding these prints or ridges?

a) Because we are constantly shedding epithelial cells, these ridges are changing daily.
b) Every human being has the same pattern of ridges.
c) They are genetically determined, therefore unique to each person.
d) Identical twins do not have the same pattern of ridges.

c) They are genetically determined, therefore unique to each person.

Regardless of race, all human beings have about the same number of melanocytes.

T/F

true

An epidermal dendritic cell is a specialized ________.

a) phagocytic cell
b) melanocyte
c) squamous epithelial cell
d) nerve cell

a) phagocytic cell

Which of the following represents a difference between eccrine sweat glands and apocrine sweat glands?

a) Eccrine sweat glands use exocytosis to make secretions, while apocrine sweat glands do not.
b) Eccrine sweat glands are located deeper in the dermis than apocrine sweat glands.
c) The secretions of apocrine sweat glands contain more fat and protein than do the secretions of eccrine glands.
d) Eccrine sweat glands begin to function at puberty, while apocrine sweat glands function throughout life.

c) The secretions of apocrine sweat glands contain more fat and protein than do the secretions of eccrine glands.

Acne is a disorder associated with ________.

a) sebaceous glands
b) ceruminous glands
c) Meibomian glands
d) sweat glands

a) sebaceous glands

Which of the following cutaneous receptors is specialized for the reception of touch or light pressure?

a) Meissner's corpuscles
b) Pacinian corpuscles
c) Free nerve endings
d) Krause's end bulbs

a) Meissner's corpuscles

The ________ gland is a modified sudoriferous gland that secretes wax.

a) mammary
b) ceruminous
c) eccrine
d) apocrine

b) ceruminous

The composition of the secretions of the eccrine glands is ________.

a) fatty substances, proteins, antibodies, and trace amounts of minerals and vitamins
b) 99% water, sodium chloride, trace amounts of wastes, and vitamin C
c) metabolic wastes
d) primarily uric acid

b) 99% water, sodium chloride, trace amounts of wastes, and vitamin C

Male pattern baldness has a genetic switch that turns on in response to ________.

a) male hormones
b) size
c) weight
d) age

a) male hormones

Destruction of the matrix of the hair bulb would result in its inability to produce oil.

T/F

false

In addition to protection (physical and chemical barrier), the skin serves other functions. Which of the following is another vital function of the skin?

a) The cells of the epidermis store glucose as glycogen for energy.
b) It aids in the transport of materials throughout the body.
c) It absorbs vitamin C so that the skin will not be subject to diseases.
d) It converts modified epidermal cholesterol to a vitamin D precursor important to calcium metabolism.

d) It converts modified epidermal cholesterol to a vitamin D precursor important to calcium metabolism.

What is the most common type of skin cancer?

a) melanoma
b) basal cell carcinoma
c) adenoma
d) squamous cell carcinoma

b) basal cell carcinoma

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