UNIT 5

Question 1

Freckles are elevated patches with an abnormal coloration of the skin.
True or False

Answer 1

False

Question 2

The contraction of the arrector muscles in humans causes __________.

Answer 2

hairs to stand on end with no apparent function

Question 3

Which of the skin layers below is the most superficial?

Answer 3

Epidermis

Question 4

Which of the following are associated with the sense of touch?

Question 5

Which of the following is not part of the skin?

Answer 5

Hypodermis

Question 6

Leather is made of the __________ layer of the dermis.

Answer 6

reticular

Question 7

Blood vessels in the __________ provide a hair with its sole source of nutrition.

Answer 7

dermal papilla

Question 8

In whom are fully developed mammary glands found?

Answer 8

In lactating females

Question 9

Mitosis in the __________ accounts for growth of the nail.

Answer 9

nail matrix

Question 10

Which of the following cells stand guard against toxins, microbes, and other pathogens?

Answer 10

Dendritic cells

Question 11

Merocrine sweat glands are associated with hair follicles in the pubic and anal regions, axilla, areola, and beard.
True or False

Answer 11

False

Question 12

The “ABCD rule” for recognizing early signs of malignant melanoma refers to which of the following characteristics of the lesion?

Answer 12

Asymmetry, border irregularity, color, and diameter

Question 13

Mammary glands are modified __________ glands that develop within the female breasts.

Answer 13

apocrine

Question 14

Looking at a slide of thin skin under the microscope, you note that the stratum basale is the __________ layer of the epidermis in from the surface.

Answer 14

fourth

Question 15

Ethnic differences in skin color are primarily caused by differences in ___________.

Answer 15

the quantity of melanin produced

Question 16

Basal cell carcinoma initially affects cells of the stratum __________.

Answer 16

Basal

Question 17

The base where a hair follicle originates in the skin is known as the __________.

Answer 17

hair bulb

Question 18

Straight hair is round, wavy hair is oval, and curly hair is relatively flat.

Answer 18

True

Question 19

Most of the skin is __________ mm thick.

Answer 19

1 to 2

Question 20

Calluses or corns are the result of accelerated multiplication by ___________.

Answer 20

keratinocytes

Question 21

Which of the following are associated with the sense of touch?

Answer 21

Tactile cells

Question 22

The fastest rate of mitosis happens in the __________.

Answer 22

stratum basale

Question 23

Each hair grows in an oblique epithelial tube called a __________.

Answer 23

hair follicle

Question 24

__________ is/are formed partly from the secretions of glands in the external ear canal.

Answer 24

Cerumen

Question 25

Which two strata of the epidermis are most susceptible to cancer?

Answer 25

Stratum spinosum and stratum basale

Question 26

What type of hair is present prenatally and usually replaced by birth?

Answer 26

Downy (Lanugo)

Question 27

Which layer is seen only in thick skin?

Answer 27

stratum lucidum

Question 28

A pilus is a __________.

Question 29

The hypodermis is characterized by an abundance of which tissue?

Answer 29

Adipose tissue

Question 30

The oil of your scalp is secreted by __________ glands associated with the hair follicles.

Answer 30

sebaceous

Question 31

Variations in hair color arise from differing amounts of __________.

Answer 31

eumelanin and pheomelanin