Lecture Chapter 6

Question 1

What are the layers of the epidermis?

Answer 1

Stratum Corneum

(Stratum Lucidum) -in thick skin

Stratum Granulosum

Stratum Spinosum

Stratum Basale

Question 2

What two types of cells communicate?

Answer 2

Melanocytes communicate with keratinocytes

Question 3

How are PG (Pigment Globules) absorbed?

Answer 3

PG is absorbed through the microvilli of keratinocytes

Question 4

Do all people have the same number of melanocytes regardless of skin tone?

Answer 4

YES

Question 5

What two things make up friction ridges (fingerprints)?

Answer 5

Epidermal ridges atop dermal papillae ridges

Question 6

To promote faster healing, would one cut paralell to cleavage lines, or perpendicular to them?

Answer 6

Paralell

Question 7

In lazer tattoo removal, what are the most common wavelengths used?

Answer 7

694 for cold colors (and black)

532 for warm colors

Question 8

What is the most common type of skin cancer, is it dangerous, and where does it originate?

Answer 8

Basal cell carcinoma

Least dangerous (does not metastasize)

Stratum Basale

Question 9

What is the intermediate type of skin cancer, is it dangerous, and where does it originate?

Answer 9

Squamous Cell Carcinoma

It does metastasize if not removed promptly

Keratinocytes in stratum spinosum

Question 10

What is the third type of skin cancer, is it dangerous, and where does it originate?

Answer 10

Malignant Melonoma

It is the most dangerous

Arises from melanocytes

Question 11

What layer of the skin do hair follicles penetrate into?

Answer 11

The dermis

Question 12

What are the two root sheath layers of hair?

Answer 12

Epithelial root sheath (deep)

Dermal root sheath (superficial)

Question 13

What are the three phases of hair growth?

Answer 13

Anagen

Catagen

Telogen

Question 14

What is the Anagen phase of hair growth?

Answer 14

Rapid growth 18 months to 7 years

Question 15

What is the Catagen phase of hair growth?

Answer 15

Recession period when hair involutes (3-4 weeks)

Question 16

What is the Telogen phase of hair growth?

Answer 16

Hair is shed

Question 17

What are nails made of?

Answer 17

Keratinized epidermal cells

Question 18

What is Onychomycosis (deep free edges) caused by?

Answer 18

Fungal infection

Question 19

What is yellow nail syndrome caused by?

Answer 19

Respiratory disease

Question 20

What are spoon nails caused by?

Answer 20

Koilonychia due to iron deficiency

Question 21

What are beau’s lines caused by?

Answer 21

Injury or malnutrition

Question 22

What is the order of acne progression?

Answer 22

Blackhead

Whitehead

Pustule

Nodule

Cyst

Question 23

What is the Rule of Nines?

Answer 23

The body’s surface is divided into areas representing 9% or multiples.

Question 24

What are the four phases of epidermal wound healing?

Answer 24

Division and Immigration

Thickening

Inflammatory

Maturation

Question 25

What primary germ layer does the epidermis arise from?

Answer 25

Ectoderm

Question 26

What primary germ layer does the dermis arise from?

Answer 26

Mesoderm

Question 27

What is the name of the vascular tissue that forms at the first stage of healing a wound?

Answer 27

Granulation tissue

Question 28

Which organs are involved in making calcitrol, the active form of Vitamin D?

Answer 28

Skin, Liver, Kidneys

Question 29

In which layers are epidermal dendritic cells found?

Answer 29

Stratum spinosum

Stratum Granulosum