QUESTION 1
Match each major part of the integumentary system with its proper structure and/or
function.
Made of areolar connective and
adipose tissue
Contains the accessory structures
of the skin, such as receptors and
sweat glands
The outer layer of the skin, made
of stratified squamous epithelium
Connects the dermis to the
muscles and stores fat
Mitosis constantly renews this
layer, which forms a barrier
between the body and the external
environment
The inner layer of the skin, made
of fibrous connective tissue
A
.
Epidermis
B
.
Dermis
C
.
Subcutaneous
Tissue
QUESTION 2
Match the following parts of the dermis with their proper descriptions.
Contains capillaries to nourish
the stratum germinativum of
the epidermis
Provide information about
changes in the external
environment
The protein that gives the
dermis its strength
Produce a lipid substance called
sebum
The cells that produce collagen
and elastin
Mitosis at the root produces the
hair shaft
Produce their secretion in times
of stress or strong emotions
Produce their secretion during
exercise or in a warm
environment
A
.
Fibroblasts
B
.
Collagen fibers
C
.
Elastin fibers
D
.
Papillary layer
E
.
Hair follicles
F. Nail follicles
G
.
Sebaceous glands
H
.
Eccrine sweat
glands
I.
Apocrine sweat
glands
J. Receptors
C.
B.
A.
C.
A.
B.
D.
J .
B.
G.
A.
E.
I.
H.
Mitosis at the root produces the
nail
The protein that gives the
dermis elasticity
QUESTION 3
The dermis is made of irregular fibrous connective tissue. What is the structure and makeup
of the matrix of this tissue that contributes to the SPECIFIC functioning of the dermis?
The fibers of the dermis are criss-cross and run in all directions. The dermis is
made up of collagen (strong) and elastin (elastic- stretchy) fibers. The strength
and elasticity allow the skin to provide a barrier to the outside environment and
for the skin to recoil after being stretched.
QUESTION 4
Reference Figure 5-2 - Which type of cell is capable of self-locomotion? Where does this type
of cell originate? What does it carry and to where? What purpose does this serve?
The Langerhans cell is capable of self-locomotion. This cell originates in the red
bone marrow. The Langerhans picks up (phagocytize) and carries foreign
materials, such as bacterium, and transport it to a lymph node. The purpose of
this is to trigger an immune response such as the production of antibodies as a
response to pathogens.
In the epidermis: 1) Where does mitosis take place? 2) What protein do the new cells
produce? 3) What purpose does this protein serve and where? 4) What happens to these
cells as they move toward the surface? 5) What are Merkel cells?
Mitosis takes place in the epidermis in stratum germinativum (stratum basale).
The new cells produce the protein keratin. In the Stratum germinativum living
keratinocytes are able to synthesize antimicrobial peptides called defensins and
as they get farther away from the capillaries of the dermis they die. In the
stratum corneum keratin prevents loss and entry of water and can also resist the
entry of chemicals and pathogens. Merkel cells are receptors for the sense of
