Exam 4 Part 3 Accessory organs

Question 1

Hair & the hair follicle: reside in the _____ & ________ ____, but originate from the _______ tissue

Answer 1

Dermis ; subcutaneous layer ; epidermal tissue

Question 2

Tube like structure which protrudes down into the dermis, houses an individual hair

Answer 2

Follicle

Question 3

Zone of actively dividing cells at the base of the hair

Answer 3

Bulb

Question 4

Column of flattened, dead keratinized cells w/in the follicle

Answer 4

Root

Question 5

Column of flattened, dead keratinized cells external to the skin’s surface

Answer 5

Shaft

Question 6

Hair root & shaft are made up of ______ (inner core), ______ (middle section) & _______ (outer portion)

Answer 6

Medulla
cortex
cuticle

Question 7

What muscles cause your hair to stand on end “goose bumps”

Answer 7

Arrector pili muscle

Question 8

Arrector pili muscle is made up of

Answer 8

Smooth muscle

Question 9

Arrector pili muscle is attached to the hair _____ surface & to the ____

Answer 9

Follicle; dermis

Question 10

Melanocytes are located in the ___ of the hair

Answer 10

Base

Question 11

HIGH concentration of melanin

Answer 11

Dark hair

Question 12

Moderate amount of melanin

Answer 12

Light drown hair

Question 13

Little melanin

Answer 13

Blond hair

Question 14

NO melanin

Answer 14

White hair

Question 15

Mixture of pigmented & un-pigmented hairs =

Answer 15

Grey hair

Question 16

Hair color containing iron?

Answer 16

Red hair

Question 17

What determines the texture of hair?

Answer 17

Shape & size of follicle

Question 18

What are the functions of hair?

Answer 18

Protection

Identification

Question 19

Geographically what population has the highest amount of body hair?

Answer 19

European descent

Question 20

Geographically what population has the least amount of body hair?

Answer 20

East Asians & Amerindians

Question 21

Modified hardened stratum corneum; divisible into nail root, nail body, & free edge

Answer 21

Nail plate

Question 22

Underlying the nail plate; continuous with stratum basale & stratum spinosum of surrounding epidermis

Answer 22

Nail bed

Question 23

Part of the nail plate; light half-moon region at the proximal end of the nail plate, due to extreme thickness of underlying nail bed

Answer 23

Lunula

Question 24

Function of nails

Answer 24

Protection

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