week 2 self-quiz questions from text Flashcards
the epidermal layer that is found in thick skin but not in thin skin is the ___?
stratum lucidum
the most common sweat glands that release watery secretion are ____
eccrine
modified sweat glands in the ear are ___
ceruminous
sweat glands located in the axillae, groin, areolae, and beards of males and that release a slightly viscous, lipid-rich secretion are ____ sweat glands.
apocrine
TRUE/FALSE
an individual with a dark skin color has more melanocytes than a fair-skinned person
FALSE
in order to permanently prevent growth of an unwanted hair, you must destroy the hair matrix?
TRUE
the layer of the epidermis that contains stem cells undergoing mitosis is the
stratum basale
the substance that helps promote mitosis in epidermal skin cells is
epidermal growth factor
which of the following is not a function of skin?
(a) calcium production (b) vitamin D synthesis (c) protection (d) excretion of wastes (e) temperature regulation
(a) calcium production
to expose underlying tissues in the bottom of the foot, a foot surgeon must first cut through the skin. what is the order that the scapel would cut?
stratum corneum
(“ lucidum - only in THICK skin)
” granulosum
” spinosum
” basale
*the Bitch Spit Grain in my Corneum
aging of the skin can result in
decrease in the activity of sebaceous glands
Which of the following is not true?
(a) Albinism is an inherited inability of melanocytes to produce
melanin. (b) Striae occurs when the dermis is overstretched to the point of
tearing. (c) In order to prevent excessive scarring, surgeons should cut par-
allel to the lines of cleavage. (d) The papillary layer of the dermis is responsible for fingerprints.
(e) Much of the body’s fat is located in the dermis of the skin.
(e) Much of the body’s fat is located in the dermis of the skin.
Which of the following statements are true?
(1) Nails are composed of tightly packed, hard, keratinized cells of the epidermis that form a clear, solid covering over the dorsal surface of the terminal end of digits.
(2) The free edge of the nail is white due to the absence of capillaries.
(3) Nails help us grasp and manipulate small objects.
(4) Nails protect the ends of digits from trauma.
(5) Nail color is due to a combination of melanin and carotene.
ALL TRUE
what produce the protein that helps protect the skin and underlying tissues from light, heat, microbes, and many chemicals?
keratinocytes
what produces a pigment that contributes to skin color and absorbs ultraviolet light
melanocytes
cells that arise from red bone marrow, migrate to the epidermis, and participate in immune responses are?
Langerhans cells
cells thought to function in the sensation of touch
Markel cells
located in the dermis, they function in the sensations of warmth, coolness, pain, itching, and tickling
free nerve endings
smooth muscles assoicated with the hair follicles; when contracted, they pull the hair shafts perpendicular to the skin’s surface
arrector pili
an abnormal thickening of the epidermis
callus
release a lipid-rich secretion that functions as a water-repellent sealant in the stratum granulosum
lamellar granules
pressure-sensitive cells found mostly in the subcutaneous layer
pacinian (lamellated) corpuscles
a fatty substance that covers and protects the skin of the fetus from the constant exposure to amniotic fluid
vernix caseosa
associated with hair follicles, these secrete an oil substance that helps prevent hair from becoming brittle, prevents evaporation of water from the skin’s surface, and inhibits the growth of certain bacteria
sebaceous glands
deep region of the dermis composed primarily of dense irregular connective tissue
reticular region
composed of keratinized stratified squamous epithelial tissue
epidermis
not considered part of the skin, it contains areolar and adipose tissues and blood vessels; attaches skin to underlying tissues and organs
subcutaneous layer (hypodermis)
superficial region of the dermis; composed of areolar connective tissue
papillary region
