BIOD 103 Module 3 Questions with Verified
Correct Answers
What is the primary organ of the integumentary system?
the skin
Name the four functions of the skin
The four functions of the skin are protection, sensation, secretion, and temperature regulation
What are the 5 layers of the epidermis?
stratum germinativum, stratum spinosum, stratum granulosum, stratum lucidum, and stratum
corneum
What are the two layers of the skin?
epidermis and dermis
What is the protein that makes up the majority of hair and nails?
keratin
What gives the skin its pigment?
melanin
What are Langerhans cells, and what is their function?
Langerhans cells are cells of the immune system that are found in the stratum spinosum of the
epidermis. Their function is to protect the body from invading microorganisms
What accessory structures of the integumentary system are found in the dermis?
Hair, sebaceous glands, and sweat glands
,What are the parts of the hair? Where can hair be found? What is the function of the
arrector pili muscle?
The hair is made up of the root growing out of the hair follicle and the shaft which is the
visible portion of the hair. Hair can be found all over the body except for the lips, palms and
soles, and the penis.
The function of the arrector pili muscle is to contract in reaction to cold or an emotion to
form goosebumps
Where are nails found? What are they made of? What is the function of the nail? What
are the sections of the nail? What is the eponychium? What is the lunula?
Nails are found on the ends of the fingers and toes. They are made of keratin. The function of
the nail is for protection for the tips of the fingers and toes.
The sections of the nail are the root and the nail bed. The eponychium is a fold of epithelial
tissue over the base of the nail body.
The lunula is the crescent-shaped area at the base of the nail body that is lighter than the rest
of the nail
What are sebaceous glands? What is their function?
Sebaceous glands are oil-secreting glands in the skin. Their function is to secrete sebum to
lubricate the hair and the nails
What is the function of sweat glands? What are the two types of sweat glands found in
the body? What are the main differences between these two glands?
, Sweat functions to cool the body through evaporation of moisture. The two types of sweat
glands found in the body are the merocrine and apocrine sweat glands.
Merocrine sweat glands are located throughout the body and release sweat directly to the
skin's surface. They are most prevalent on the soles of the feet and palms of the hands.
Apocrine sweat glands are located in the axillae, around the nipples, and in the groin. They
begin to secrete sweat during puberty and they secrete sweat into the hair follicles located in
those areas
Use the combining form aden/o, meaning gland, and the suffixes
a. Surgical removal of a gland
b. Inflammation of a gland
c. Tumor in a gland
d. Disease of a gland
e. Enlarged gland
A) adenectomy
B) adenitis
C) adenoma
D) adenopathy
E) adenomegaly
Use the suffix -derma, meaning a skin condition, and the combining forms
a. Hard skin condition
Correct Answers
What is the primary organ of the integumentary system?
the skin
Name the four functions of the skin
The four functions of the skin are protection, sensation, secretion, and temperature regulation
What are the 5 layers of the epidermis?
stratum germinativum, stratum spinosum, stratum granulosum, stratum lucidum, and stratum
corneum
What are the two layers of the skin?
epidermis and dermis
What is the protein that makes up the majority of hair and nails?
keratin
What gives the skin its pigment?
melanin
What are Langerhans cells, and what is their function?
Langerhans cells are cells of the immune system that are found in the stratum spinosum of the
epidermis. Their function is to protect the body from invading microorganisms
What accessory structures of the integumentary system are found in the dermis?
Hair, sebaceous glands, and sweat glands
,What are the parts of the hair? Where can hair be found? What is the function of the
arrector pili muscle?
The hair is made up of the root growing out of the hair follicle and the shaft which is the
visible portion of the hair. Hair can be found all over the body except for the lips, palms and
soles, and the penis.
The function of the arrector pili muscle is to contract in reaction to cold or an emotion to
form goosebumps
Where are nails found? What are they made of? What is the function of the nail? What
are the sections of the nail? What is the eponychium? What is the lunula?
Nails are found on the ends of the fingers and toes. They are made of keratin. The function of
the nail is for protection for the tips of the fingers and toes.
The sections of the nail are the root and the nail bed. The eponychium is a fold of epithelial
tissue over the base of the nail body.
The lunula is the crescent-shaped area at the base of the nail body that is lighter than the rest
of the nail
What are sebaceous glands? What is their function?
Sebaceous glands are oil-secreting glands in the skin. Their function is to secrete sebum to
lubricate the hair and the nails
What is the function of sweat glands? What are the two types of sweat glands found in
the body? What are the main differences between these two glands?
, Sweat functions to cool the body through evaporation of moisture. The two types of sweat
glands found in the body are the merocrine and apocrine sweat glands.
Merocrine sweat glands are located throughout the body and release sweat directly to the
skin's surface. They are most prevalent on the soles of the feet and palms of the hands.
Apocrine sweat glands are located in the axillae, around the nipples, and in the groin. They
begin to secrete sweat during puberty and they secrete sweat into the hair follicles located in
those areas
Use the combining form aden/o, meaning gland, and the suffixes
a. Surgical removal of a gland
b. Inflammation of a gland
c. Tumor in a gland
d. Disease of a gland
e. Enlarged gland
A) adenectomy
B) adenitis
C) adenoma
D) adenopathy
E) adenomegaly
Use the suffix -derma, meaning a skin condition, and the combining forms
a. Hard skin condition
