Chapter 5 Part 1

Question 1

What are the three major regions of skin?

Answer 1

1. ) epidermis - outermost region
2. ) dermis - middle region
3. ) hypodermis - deepest region

Question 2

______ produce the fibrous protein keratin.

Answer 2

Keratinocytes

Question 3

______ produce the brown pigment melanin.

Answer 3

Melanocytes

Question 4

______ are epidermal macrophages that help activate the immune system.

Answer 4

Langerhan’s cells (dendritic cells)

Question 5

______ function as touch receptors in association with sensory nerve endings. These are cells plus a disc-like sensory nerve ending that functions as a sensory receptor for touch.

Answer 5

Merkel discs

Question 6

______ is the protein found in the epidermis that is responsible for toughening the skin.

Answer 6

Keratin

Question 7

______ are cell remnants of the stratum corneum.

Answer 7

Cornified keratinocytes

Question 8

______ is the layer of the epidermis where cells undergo rapid division, hence its alternate name, stratum germinativum.

Answer 8

Stratum basale

Question 9

What is the outermost layer of the epidermis?

Answer 9

Stratum corneum

Question 10

What are the two layers of the dermis?

Answer 10

papillary layer and reticular layer

Question 11

In the dermis, the ______ layer accounts for approximately 80% of the thickness of the skin.

Answer 11

Reticular layer

Question 12

What is the subcutaneous layer that is deep to the skin?

Answer 12

Hypodermis

Question 13

Name the three pigments that contribute to skin color.

Answer 13

1. ) Melanin - yellow to reddish-brown to black pigment, responsible for dark skin colors.
2. ) Carotene - yellow to orange pigment, most obvious in the palms and soles of the feet.
3. ) Hemoglobin - reddish pigment responsible for the pinkish hue of the skin.

Question 14

______ is the yellow to reddish-brown to black pigment, responsible for dark skin colors.

Answer 14

Melanin

Question 15

______ is the yellow to orange pigment, most obvious in the palms and soles of the feet.

Answer 15

Carotene

Question 16

______ is the reddish pigment responsible for the pinkish hue of the skin.

Answer 16

Hemoglobin

Question 17

What are the four types of sweat glands?

Answer 17

1. ) Eccrine sweat glands
2. ) Apocrine sweat glands
3. ) Ceruminous glands
4. ) Mammary glands

Question 18

_______ glands are found in palms, soles of the feet, and forehead.

Answer 18

Eccrine sweat glands

Question 19

______ glands are found in axillary and anogenital areas.

Answer 19

Apocrine sweat glands

Question 20

______ are modified apocrine glands in the external ear canal that secrete cerumen.

Answer 20

Ceruminous glands

Question 21

______ are specialized sweat glands that secrete milk.

Answer 21

Mammary glands

Question 22

What type of glands produce ear wax?

Answer 22

Ceruminous glands