Chapter 5 Flashcards
The central axis of the hair is the
Select one:
a. shaft.
b. cuticle.
c. hair bulb.
d. medulla.
e. root.
d. medulla.
Fingernails are comprised of:
Select one:
a. epithelial and collagen fibers produced in the dermis
b. thin, dead scaly cells
c. collagen deposited by the lunula and the matrix
d. proteins secreted by the nail groove from the matrix
b. thin, dead scaly cells
he portion of the hair below the surface of the skin is the
Select one:
a. shaft.
b. cuticle.
c. hair bulb.
d. medulla.
e. root.
e. root.
A
sebaceous gland
B
epidermis and dermis
C
hypodermis
D
arrector pilli
E
hair follicle
What protein is found in the nails, hair, and epidermis?
Select one:
a. melanin
b. keratin
c. carotene
d. elastin
e. collagen
b. keratin
A
sweat pore
B
sebaceous gland
C
apocrine sweat gland
D
duct of eccrine sweat gland
E
hair follicle
Which of the following statements concerning the epidermis is true?
Select one:
a. The dermis is superficial to the epidermis.
b. The epidermis contains numerous blood vessels.
c. The most numerous cells in the epidermis are the melanocytes.
d. The epidermis is nourished by blood vessels located in the dermis.
e. The epidermis is very permeable to water-soluble molecules.
d. The epidermis is nourished by blood vessels located in the dermis.
The vesicles that contain melanin are called ______.
Select one:
a. melanosomes
b. melanocytes
c. keratinocytes
d. Golgi apparatus
a. melanosomes
The contraction of the arrector pili:
Select one:
a. pulls the follicle into a more perpendicular position in relation to the skin surface
b. pulls the follicle into a more oblique angle in relation to the skin surface
a. pulls the follicle into a more perpendicular position in relation to the skin surface
Melanin is produced only by
Select one:
a. keratinocytes.
b. basal cells.
c. Langerhans cells.
d. melanocytes.
e. Merkel’s cells.
d. melanocytes.
Lead poisoning can be detected by doing an analysis of
Select one:
a. sweat.
b. skin folds.
c. nails.
d. hair.
e. skin.
d. hair.
When the arrector pili muscles contract
Select one:
a. the body is able to lose heat.
b. “goose bumps” form on the skin.
c. the hair on your arms and legs begins to curl.
d. the sweat glands empty their contents onto the surface of the skin.
e. no change is noted on the skin surface.
b. “goose bumps” form on the skin.
Which of the following statements is false?
Select one:
a. Most sebaceous glands are connected by a duct to the upper portion of the hair follicle.
b. Secretions from sebaceous glands provide protection against bacteria.
c. Secretions from sebaceous glands oil the hair and skin.
d. Sebaceous glands are an example of apocrine glands.
e. Sebaceous secretions are lipid soluble.
d. Sebaceous glands are an example of apocrine glands.