lHLSC 2416 Exam 3 ACTUAL Questions
And CORRECT and Verified Answers
argest; 20 - Correct Answer--The skin is the __________ organ system in the body -- it covers _____
square feet of surface area in the average adult.
epidermis (outer) and dermis (inner0 - Correct Answer--What are the two layers of the skin?
a subcutaneous layer of adipose tissue - Correct Answer--What lies beneath the two layers of skin?
a thin but tough protective outer layer - Correct Answer--Explain the epidermis.
they are bound tightly together in sheets that form a rugged protective barrier - Correct Answer--How
are cells organized in the epidermis?
the inner layer of the epidermis that forms new skin cells - Correct Answer--Explain the basal cell layer.
keratin - Correct Answer--What is the major ingredient in skin cells formed in the basal cell layer?
melanocytes; melanin - Correct Answer--The ______________ interspersed along the basal cell layer
produce the pigment __________, which gives brown tones to the skin and hair.
True: only the amount of melanin they produce varies with genetic, hormonal, and environmental
influences. - Correct Answer--T/F: People of all skin colors have the same number of melanocytes.
the layer above the basal layer where new cells migrate to and flatten; consists of dead keratinized cells
that are interwoven and closely packed (cells are constantly being shed, or desquamated, and are
replaced with new cells) - Correct Answer--Explain the horny cell layer.
every 4 weeks - Correct Answer--How often is the epidermis completely replaced?
,palms and soles - Correct Answer--Where is the skin thicker because of work and weight bearing?
1. melanin (brown)
2. carotene (yellow-orange)
3. red-purple tones in underlying vascular bed - Correct Answer--Where is skin color derived from?
the inner supportive layer consisting mostly of connective tissue/ collagen - Correct Answer--Explain the
dermis.
a tough, fibrous protein that enables the skin to resist tearing - Correct Answer--What is collagen?
dermis - Correct Answer--The nerves, sensory receptors, blood vessels, and lymphatics lie in the
_________.
hair follicles, sebaceous glands, and sweat glands - Correct Answer--What are some appendages from
the epidermis that are embedded in the dermis?
adipose tissue (lobules of fat cells) that stores fat for energy, provides insulation for temperature control,
and aids in protection
also gives skin increased mobility - Correct Answer--Explain the subcutaneous layer's structure and
functions.
keratin - Correct Answer--Hairs are threads of __________.
shaft; root - Correct Answer--The hair ________ is the visible projecting part, and the _______ is below
the surface embedded in the follicle.
the expanded area at the root where new cells are produced at a high rate - Correct Answer--What is the
bulb matrix?
,independently (some are resting and some are growing) - Correct Answer--Each follicle functions
________________.
muscles that contract and elevate the hair so it resembles "goose flesh" when the skin is exposed to cold
or in emotional states - Correct Answer--What are arrector pili muscles?
vellus and terminal hair - Correct Answer--What are the two types of hair?
Fine, faint hair that covers most of the body - Correct Answer--What are vellus hairs?
darker, thicker hair that grows on the scalp and eyebrows and, after puberty, on the axillae, the pubic
area, and the face and chest in the male - Correct Answer--What are terminal hairs?
glands that produce a protective lipid substance, sebum, which is secreted through the hair follicles -
Correct Answer--What are sebaceous glands?
sebum - Correct Answer--________ oils and lubricates the skin and hair and forms an emulsion with
water that retards water loss from the skin
everywhere except the palms and soles; most abundant on the scalp, forehead, face, and chin - Correct
Answer--Where are sebaceous glands located?
eccrine and apocrine - Correct Answer--What are the two types of sweat glands?
-coiled tubules that open directly onto the skin surface and produce a dilute saline solution called sweat
-widely distributed
-mature in 2-month old infant - Correct Answer--What are eccrine glands?
-glands that produce a thick, milky secretion and open into the hair follicles
, -mainly in axillae, anogenital area, nipples, and navel
-become active during puberty - Correct Answer--What are apocrine glands?
bacterial flora residing on the skin surface reacts with apocrine sweat - Correct Answer--What produces
the characteristic musky body odor?
hard plates of keratin on the dorsal edges of the fingers and toes - Correct Answer--Describe nails.
lunula - Correct Answer--The _________ is the white, opaque, semilunar area at the proximal end of the
nail.
covers and protects the nail matrix - Correct Answer--What is the function of the cuticle?
protection
prevents penetration
perception
temperature regulation
identification
communication
wound repair
absorption and excretion
production of vitamin d - Correct Answer--Name some functions of the skim.
at 3 months gestation - Correct Answer--When do hair follicles develop in the fetus?
the fine downy hair of the newborn infant (replaced by vellus hair in the first few months after birth) -
Correct Answer--What is lanugo?
And CORRECT and Verified Answers
argest; 20 - Correct Answer--The skin is the __________ organ system in the body -- it covers _____
square feet of surface area in the average adult.
epidermis (outer) and dermis (inner0 - Correct Answer--What are the two layers of the skin?
a subcutaneous layer of adipose tissue - Correct Answer--What lies beneath the two layers of skin?
a thin but tough protective outer layer - Correct Answer--Explain the epidermis.
they are bound tightly together in sheets that form a rugged protective barrier - Correct Answer--How
are cells organized in the epidermis?
the inner layer of the epidermis that forms new skin cells - Correct Answer--Explain the basal cell layer.
keratin - Correct Answer--What is the major ingredient in skin cells formed in the basal cell layer?
melanocytes; melanin - Correct Answer--The ______________ interspersed along the basal cell layer
produce the pigment __________, which gives brown tones to the skin and hair.
True: only the amount of melanin they produce varies with genetic, hormonal, and environmental
influences. - Correct Answer--T/F: People of all skin colors have the same number of melanocytes.
the layer above the basal layer where new cells migrate to and flatten; consists of dead keratinized cells
that are interwoven and closely packed (cells are constantly being shed, or desquamated, and are
replaced with new cells) - Correct Answer--Explain the horny cell layer.
every 4 weeks - Correct Answer--How often is the epidermis completely replaced?
,palms and soles - Correct Answer--Where is the skin thicker because of work and weight bearing?
1. melanin (brown)
2. carotene (yellow-orange)
3. red-purple tones in underlying vascular bed - Correct Answer--Where is skin color derived from?
the inner supportive layer consisting mostly of connective tissue/ collagen - Correct Answer--Explain the
dermis.
a tough, fibrous protein that enables the skin to resist tearing - Correct Answer--What is collagen?
dermis - Correct Answer--The nerves, sensory receptors, blood vessels, and lymphatics lie in the
_________.
hair follicles, sebaceous glands, and sweat glands - Correct Answer--What are some appendages from
the epidermis that are embedded in the dermis?
adipose tissue (lobules of fat cells) that stores fat for energy, provides insulation for temperature control,
and aids in protection
also gives skin increased mobility - Correct Answer--Explain the subcutaneous layer's structure and
functions.
keratin - Correct Answer--Hairs are threads of __________.
shaft; root - Correct Answer--The hair ________ is the visible projecting part, and the _______ is below
the surface embedded in the follicle.
the expanded area at the root where new cells are produced at a high rate - Correct Answer--What is the
bulb matrix?
,independently (some are resting and some are growing) - Correct Answer--Each follicle functions
________________.
muscles that contract and elevate the hair so it resembles "goose flesh" when the skin is exposed to cold
or in emotional states - Correct Answer--What are arrector pili muscles?
vellus and terminal hair - Correct Answer--What are the two types of hair?
Fine, faint hair that covers most of the body - Correct Answer--What are vellus hairs?
darker, thicker hair that grows on the scalp and eyebrows and, after puberty, on the axillae, the pubic
area, and the face and chest in the male - Correct Answer--What are terminal hairs?
glands that produce a protective lipid substance, sebum, which is secreted through the hair follicles -
Correct Answer--What are sebaceous glands?
sebum - Correct Answer--________ oils and lubricates the skin and hair and forms an emulsion with
water that retards water loss from the skin
everywhere except the palms and soles; most abundant on the scalp, forehead, face, and chin - Correct
Answer--Where are sebaceous glands located?
eccrine and apocrine - Correct Answer--What are the two types of sweat glands?
-coiled tubules that open directly onto the skin surface and produce a dilute saline solution called sweat
-widely distributed
-mature in 2-month old infant - Correct Answer--What are eccrine glands?
-glands that produce a thick, milky secretion and open into the hair follicles
, -mainly in axillae, anogenital area, nipples, and navel
-become active during puberty - Correct Answer--What are apocrine glands?
bacterial flora residing on the skin surface reacts with apocrine sweat - Correct Answer--What produces
the characteristic musky body odor?
hard plates of keratin on the dorsal edges of the fingers and toes - Correct Answer--Describe nails.
lunula - Correct Answer--The _________ is the white, opaque, semilunar area at the proximal end of the
nail.
covers and protects the nail matrix - Correct Answer--What is the function of the cuticle?
protection
prevents penetration
perception
temperature regulation
identification
communication
wound repair
absorption and excretion
production of vitamin d - Correct Answer--Name some functions of the skim.
at 3 months gestation - Correct Answer--When do hair follicles develop in the fetus?
the fine downy hair of the newborn infant (replaced by vellus hair in the first few months after birth) -
Correct Answer--What is lanugo?
