Bio exam 2

Question 1

The skin carries out the first step in the synthesis of vitamin D.

Answer 1

true

Question 2

The youngest keratinocytes are found in the stratum basale.

Answer 2

true

Question 3

Melanin, hemoglobin, and possibly carotene give color to the skin.

Answer 3

true

Question 4

Albinism is the genetic lack of melanin that results in a milky white coloration of the skin.

Answer 4

true

Question 5

Embarrassment can be perceived by an abnormal coloration of the skin called cyanosis.

Answer 5

false

Question 6

Hair and nails are composed of collagen.

Answer 6

false

Question 7

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

Answer 7

false

Question 8

Which of the following is not part of the skin?

Answer 8

Hypodermis

Question 9

Most of the skin is_________ mm thick.

Answer 9

1 to 2

Question 10

In which of the following regions would a subcutaneous injection be administered?

Answer 10

Hypodermis

Question 11

Which of the skin layers below is the most superficial?

Answer 11

Epidermis

Question 12

Which of the following best describes the composition of the dermis?

Answer 12

Collagen and fibroblasts

Question 13

What type of tissue is found in the most superficial layer of skin?

Answer 13

Stratified squamous epithelium

Question 14

Which of the following cells is largely responsible for skin color?

Answer 14

Melanocyte

Question 15

Which layer of the epidermis consists of up to 30 layers of dead cells?

Answer 15

Stratum corneum

Question 16

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

Answer 16

Tactile cells

Question 17

The fastest rate of mitosis happens in the_________.

Answer 17

stratum basale

Question 18

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

Answer 18

Dendritic cells

Question 18

Fingerprints left on things we touch are associated with our_________.

Answer 18

dermal papillae

Question 19

Calluses or corns are the result of accelerated multiplication by_________.

Answer 19

keratinocytes

Question 20

Which layer is seen only in thick skin?

Answer 20

Stratum lucidum

Question 21

The thickest and deepest layer of the dermis is the_________ layer.

Answer 21

reticular

Question 22

The hypodermis is characterized by an abundance of which tissue?

Answer 22

Adipose tissue

Question 22

The skin discoloration most likely to suggest physical abuse is_________.

Answer 22

hematoma

Question 23

The reddish color of the skin of the lips is primarily due to the presence of which pigment?

Answer 23

Hemoglobin

Question 24

Which skin color is most likely to result from anemia?

Answer 24

Pallor

Question 25

Increased bilirubin levels cause a skin discoloration called_________.

Answer 25

jaundice

Question 26

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

Answer 26

the type and quantity of melanin produced

Question 27

A_________ is an elevated patch of melanized skin.

Answer 27

mole

Question 28

A pilus is a_________.

Answer 28

hair

Question 29

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

Answer 29

Downy (Lanugo)

Question 30

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

Answer 30

hair bulb

Question 31

The contraction of the arrector muscles on the trunk and limbs of humans causes __________.

Answer 31

hairs to stand on end with no apparent function

Question 32

Each hair grows in an oblique epithelial tube called a_________.

Answer 32

hair follicle

Question 33

Excessive hairiness is called_________.

Answer 33

hirsutism

Question 33

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

Answer 33

sebaceous

Question 34

What is the white opaque "moon" often found at the proximal end of a fingernail called?

Answer 34

Lunule

Question 35

Variations in hair color arise from differing amounts of_________.

Answer 35

eumelanin and pheomelanin

Question 36

Mitosis in the_________ accounts for growth of the nail.

Answer 36

nail matrix

Question 37

Secretions from_________ glands contribute to the acid mantle that inhibits bacterial growth on the skin.

Answer 37

eccrine sweat

Question 37

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

Answer 37

Cerumen

Question 38

The ___________ glands are scent glands that respond especially to stress and sexual stimulation, and may be a source of sex pheromones.

Answer 38

apocrine

Question 38

Which cutaneous glands are concerned with cooling the body?

Answer 38

Merocrine glands

Question 39

Mammary glands are modified_________ glands that develop within the female breasts during pregnancy and lactation.

Answer 39

apocrine

Question 40

_________ burns involve the epidermis, all of the dermis, and often some deeper tissue.

Answer 40

Third-degree

Question 40

The "ABCDE rule" for recognizing early signs of malignant melanoma refers to which of the following characteristics of the lesion?

Answer 40

Asymmetry, border irregularity, color, diameter, and evolution

Question 41

The least common, but most deadly, type of skin cancer is_________.

Answer 41

melanoma

Question 42

The most immediate threat to the life of a patient with severe burns is_________.

Answer 42

fluid loss

Question 43

The skin is a barrier to all of the following except_________.

Answer 43

metals such as mercury

Question 44

In whom are fully developed mammary glands found?

Answer 44

In lactating females