Ch6

Question 1

1. Stratum corneum
2. Stratum lucidum
3. Stratum granulosum
4. Stratum spinosum
5. Stratum basale

Answer 1

1. Many cell layers of dead keratinocytes filled with keratin (outermost layer of skin)
2. A thin translucent band consisting of a few rows of flat, dead, keratinocytes
3. 3-5 layers of flattened keratinocytes possessing filaments and keratohyaline and lamellated granules.
4. Several cell layers thick, with intermediate filaments, keratinocytes and Langerhans’ cells
5. Single row of cells composed of keratinocyte stem cells, melanocytes and Merkel cells

Question 2

1. Epidermis (Ectoderm)
2. Papillary layer of dermis (Mesoderm )
3. Reticular layer of dermis (Mesoderm )
4. Dermis (Neural crests)
5. Hypodermis

Answer 2

1. Keratinized stratified squamous epithelium
2. Dense irregular connective tissue
3. Areolar connective tissue
4. Fibrous Connective Tissue
5. Adipose connective tissue

Question 3

Root

Answer 3

The portion of the hair that is embedded in the skin

Question 4

Cuticle

Answer 4

Superficial covering of a hair consisting of a single layer of cells that overlap one another

Question 5

Shaft

Answer 5

Region of a hair that projects above the skin surface

Question 6

Medulla

Answer 6

The central core of a hair, consisting of large cells and air spaces

Question 7

Cortex

Answer 7

The intermediate layer of a hair composed of several layers of flattened cells

Question 8

Hair matrix

Answer 8

Actively dividing cellular area of the bulb that produces the hair

Question 9

Connective tissue root sheath

Answer 9

Superficial wall of the hair follicle which is derived from the dermis

Question 10

Hair bulb

Answer 10

The expanded, deep region of a hair follicle

Question 11

Root hair plexus

Answer 11

A knot of sensory nerve endings wrapped around the base of a hair follicle

Question 12

Arrector pili

Answer 12

Bundle of smooth muscle tissue running from the superficial dermis to the hair follicle; that is responsible for producing goose bumps

Question 13

Sebaceous glands (Location, Product, & Function)

Answer 13

• Found all over the body except the palms and soles
• Oil
• Holocrine glands that secrete an oily substance called sebum to lubricate skin and hair

Question 14

Eccrine sudoriferous glands (Location, Product, & Function)

Answer 14

• Most abundant on the palms, soles, and forehead
• Sweat
• Secrete a hypotonic filtrate of the blood (99% water with traces of salt, vitamin C, antibodies, metabolic wastes and lactic acid)

Question 15

Apocrine sudoriferous glands (Location, Product, & Function)

Answer 15

• Axillary, anal, and genital regions
• Components of sweat plus fatty substances and proteins
• Contains same secretions as true sweat, plus fatty substances and proteins. When these organic molecules decompose by bacterial action there is an associated unpleasant odor.

Question 16

Ceruminous glands (Location, Product, & Function)

Answer 16

• Line the external ear canal
• Components of earwax
• Modified apocrine glands that secrete earwax

Question 17

Mammary glands (Location, Product, & Function)

Answer 17

• Pectoral region
• Milk
• Modified sweat glands that secrete milk