A&P Lecture Quiz 6- Integumentary System
Which type of hair forms the beard on the faces of males?
Terminal
The portion of a hair that protrudes above the surface of the skin is the
hair shaft.
This is the dermal layer closest to the epidermis.
papillary layer
From deep to superficial, the order of the strata of the epidermis is
Basale - spinosum - granulosum - lucidum - corneum
The growth rate for a scalp hair is about _______ per day for 1.5 to 7 years, and then the hair becomes dormant.
1.3 mm
What is the composition of the subcutaneous layer?
Areolar connective tissue and adipose connective tissue
Which skin markings usually disappear during childhood?
Capillary hemangiomas
The layer of epithelium that covers the skin is called the
Epidermis
What is the greatest risk factor for skin cancer?
Exposure to UV light rays
Compared to the young, elderly individuals have _______ epidermal dendritic skin cells.
Fewer
What type of stimulus is detected by the sensory receptors of the skin?
Heat, Cold, Pressure, & Vibration
Normally, skin color results from a combination of
Melanin, Hemoglobin, & Carotene
Which of the following skin changes is usually associated with aging?
Loss of subcutaneous tissue contributes to sagging of the skin.
Normally, skin color results from a combination of
Melanin, Hemoglobin and Carotene
Which are applicable to the stratum corneum?
Most superficial stratum, Cells are dead, Interlocking keratinized cells, & Cells are anucleate
Which is the actively growing part of the nail?
Nail Matrix
Areas where adult males tend to accumulate subcutaneous fat include the
Neck, abdomen, and buttocks
To speed healing from surgery, incisions should be placed ________ to lines of cleavage.
Parallel
Where on the human body is the hair thick enough to retain heat?
Scalp
Which of the following statements is false?
Sebaceous glands are an example of apocrine glands.
Which of these are functions of hair?
Sensory reception, Heat retention, Pheromone dispersal, Protection, & Visual identification
Why might someone pale when they are exposed to a cold temperature?
Vasoconstriction has occurred
Fine hair called _________, which is unpigmented or lightly pigmented, is the primary human hair and is found on the upper and lower limbs.
Vellus
Which of the following statements concerning vitamin D is false?
Vitamin D causes the kidney to excrete calcium.
Generally, people have ________ number of melanocytes ______________.
about the same; no matter where they live
Merocrine sweat glands
aid in cooling the body.
The type of gland that secretes sweat into a hair follicle that is found in the axillary, anal, and genital regions is the ________ sweat gland.
apocrine
The structure responsible for pulling on the follicle and causing "goose bumps" is the
arrector pili muscle.
Another name for the skin is the _________ membrane.
cutaneous
One of the main dangers of burns is
dehydration, as water can escape from the body.
Blood capillaries that supply nourishment for the epidermis are located in the
dermal papillae.
Fingerprints and footprints are produced by projections into the epidermis called
dermal papillae.
Cancer cells in the epidermis are attacked by
epidermal dendritic cells.
Which of the following will help cool the body?
evaporation of sweat from the skin's surface
Thick skin contains
five epidermal strata and lacks sebaceous glands.
The stratum corneum beneath the free edge of the nail is the
hyponychium
Epidermal dendritic (Langerhans) cells function as part of the ______ response.
immune
The epithelial tissue root sheath is the _________ layer of the concentric layers making up the hair follicle wall; it derives from the ________.
inner; epidermis
Thick skin
is found in areas subject to pressure or friction such as palms.
Intact skin provides protection because
it forms a physical barrier against the entry of microbes.
Delicate unpigmented hairs that cover the fetus in early development are called
lanugo hairs.
The activity of apocrine sweat glands
leads to body odor.
Sebum is a secretion that
lubricates skin and helps defend against bacteria.
Cerumen is a secretion that
lubricates the ear canal and traps debris before it reaches the eardrum.
The two types of leukocytes that clean up debris underneath the blood clot of a wound are
macrophages and neutrophils.
Skin cancer is the _______ type of cancer, and due to sun exposure it occurs most frequently on the __________.
most common; head and neck
The nail root and the nail body attach to the
nail bed.
Nail cells are produced by the
nail matrix.
Keratinization
produces a layer of cells that are dead but strong
The function of melanin in the skin is to
protect against UV light.
Nails
protect the ends of digits.
An autoimmune disorder that affects the process of keratinization results in the condition known as
psoriasis.
The reticular layer of the dermis consists primarily of
reticular connective tissue.
The part of the hair that extends beyond the skin surface is called the
shaft.
The layer of the epidermis in which there is the greatest amount of mitotic activity.
stratum basale
This stratum contains many layers of dead squamous cells.
stratum corneum
Which layer of the epidermis is found only in a few areas of the body?
stratum lucidum
Lines of cleavage are a result of
the alignment of dermal papillae.
Lines of cleavage are a result of
the orientation of collagen fibers in the dermis.
Tactile (Merkel) cells are sensitive to
touch.
Within the body, carotene is converted to
vitamin A, which is important for visual function.
