5.2 Hair;Nails;Glands

Question 1

Hair locations

Answer 1

All body parts except palms, soles, lips, nipples, portions of the external reproductive organs

Question 2

Hair and puberty

Answer 2

After puberty there is noticeable hair in the auxiliary and pelvic regions

Question 3

Hair growth rate

Answer 3

Different growing and resting periods in different locations

Question 4

Hirsutism

Answer 4

Excess body hair

Question 5

Hair follicles

Answer 5

Surround the hair within the skin and are formed from epidermal cells; located in dermis

Question 6

Hair matrix

Answer 6

Where cell division occurs; hair growth center; cells become keratinized as they are pushed out and away from blood supply

Question 7

Hair root

Answer 7

Portion of hair within follicle

Question 8

Hair shaft

Answer 8

Portion of hair that continues beyond the skin

Question 9

Alopecia

Answer 9

Hair loss
Androgenetic alopecia and alopecia areata

Question 10

Androgenetic alopecia

Answer 10

Male pattern of baldness; most common

Question 11

Alopecia areata

Answer 11

Sudden onset of patchy hair loss

Question 12

Sebaceous (oil) glands

Answer 12

Secrete oil into follicle

Question 13

Arrector pili muscle

Answer 13

Smooth muscle attached to hair follicle; creates goosebumps

Question 14

Nail cells

Answer 14

Specialized epithelial cells in nail root (base of nail)
become keratinized as they move away from root

Question 15

Nail body

Answer 15

Visible portion of the nail

Question 16

Nail bed

Answer 16

part under the nail body

Question 17

Cuticle

Answer 17

Fold of skin that hides nail root

Question 18

Nail color

Answer 18

Pink color due to vascular dermis beneath - nail has no color

Question 19

Lanula

Answer 19

Whitish half-moon shape at base of nail, thicker and rapidly reproducing area

Question 20

Glands

Answer 20

Specialized cells that produce and secrete substances into ducts
sweat
sebaceous

Question 21

Sweat glands

Answer 21

Sudoriferous
present in all regions of the skin
3 types: apocrine, eccrine; ceruminous

Question 22

Apocrine glands

Answer 22

sweat glands that Open into hair follicles in anal region, groin, and armpits
begin to secrete at puberty

Question 23

Eccrine glands

Answer 23

sweat glands that open onto skin surface
active when body heats up; lowers temp
sweat (perspiration) is mostly water but also wastes

Question 24

ceruminous glands

Answer 24

Modified sweat gland in ear that produces cerumen (earwax)

Question 25

Sebaceous glands

Answer 25

Associated with hair follicle
Secrete oily substance - sebum

Question 26

Sebum characteristics

Answer 26

Lubricates and waterproofs hair and skin
weakens or kills bacteria on skin surface

Question 27

Sebum collection

Answer 27

If sebum collects whiteheads or blackheads form
acne vulgaris

Question 28

acne vulgaris

Answer 28

inflammation of sebaceous glands

Question 29

Mammary gland

Answer 29

modified apocrine gland that produces milk after childbirth