Chapter 6

Question 1

Intgument

Answer 1

The skin covering the body; Also known as the cutaneous membrane

Question 2

Dermatology

Answer 2

The study and treatment of skin

Question 3

Epidermis

Answer 3

Stratified squamous epithelium

Question 4

Stratum Basale

Answer 4

Deepest epidermal Layer; Occupied by keratinocytes; melanocytes, and tactile cells

Question 5

Stratum Spinosum

Answer 5

Several layers of polygonal keratinocytes; also contains dendritic cells (immune cells) and melanocytes

Question 6

Stratum Granulosum

Answer 6

3-5 layers of keratinocytes; fist layer of keratinization

Question 7

Stratum lucidum

Answer 7

Translucent layer of keratinocytes; found only in thick skin; Filled with eleidin (transparent protein)

Question 8

Stratum Corneum

Answer 8

20-30 layers of dead, interlocking keratinized cells;

Question 9

Melanin

Answer 9

Pigment produced and stored in melanocytes

Question 10

Carotene

Answer 10

Yellow-orange pigment acquired from orange vegetables (Vitamin A)

Question 11

Thick Skin

Answer 11

Hands and feet; all 5 layers of epidermal strata; no hair follicles or sebaceous glands

Question 12

Thin Skin

Answer 12

Covers most of the body; lacks stratum lucidum; has sweat glands, hair follicles, and sebaceous glands

Question 13

Papillary Layer of Dermis

Answer 13

Superficial region of the dermis; composed of areolar connective tissue; Dermal Papillae contain capillaries and sensory nerve endings; Interlock and increase the area of contact between layers

Question 14

Reticular Layer of the Dermis

Answer 14

Extends from the papillary layer to the subcutaneous layer; primarily dense irregular connective tissue; contains large bundles of collage fibers

Question 15

Hypodermis

Answer 15

Subcutaneous Layer; areolar and adipose connective tissue; not part of integumentary system but closely involved with structure and function of skin

Question 16

Lines of Clevage

Answer 16

Collagen and elastic fibers oriented in parallel bundles function to resist stress

Question 17

Lanugo Hair

Answer 17

Fine, downy hair that appears in the last trimester

Question 18

Vellus Hair

Answer 18

Primary human hair found on upper and lower limbs

Question 19

Terminal Hair

Answer 19

Coarser, pigmented, longer; Found on scalp, eyebrows, eyelashes, and beards; Replaces Vellus hair in axillary and pubic regions during puberty

Question 20

Functions of Hair (6)

Answer 20

Protection; Facial Expression; Heat Retention; Sensory reception; Visual Identification; Chemical Signal Dispersion

Question 21

Merocrine Glands

Answer 21

Simple, coiled tubular glands; discharge secretions onto skin surface; Major function of thermoregulation; Produce secretions by exocytosis

Question 22

Sebaceous Glands

Answer 22

Produce oily secretion called sebum; holocrine glands; activated during puberty; secretion stimulated by hormones (androgens)

Question 23

Apocrine Glands

Answer 23

Coiled tubular glands; discharge secretions into hair follicles; produce secretions by exocytosis; found in axillae, around nipples, and in pubic region; Produce viscous cloudy secretions that contain protein and lipids and produce odor when acted on by bacteria

Question 24

Ceruminous Glands

Answer 24

Modified apocrine glands; produce cerumen (ear-wax) that helps trap foreign material and lubricate acoustic meatus and eardrum

Question 25

Mammary Glands

Answer 25

Modified apocrine sweat glands; only function in pregnant and lactating females; produce milk