Chapter 7:: Biology of Hair Follicles Flashcards Preview

Derma 9 > Chapter 7:: Biology of Hair Follicles > Flashcards

Flashcards in Chapter 7:: Biology of Hair Follicles Deck (10)
1

Decapentaplegic (Dpp/BMP), engrailed (en), Homeobox (hox), hedgehog/patched (hh/ptc), notch, ________, and branchless (Fgf) genes are all critical for hair follicle and vertebrate development in general

wingless/ armadillo (wg/wnt/catenin)

2

The first hairs formed are ________, which are nonpig- mented, soft, and fine.

lanugo hairs

3

means loss of hair

alopecia

4

_______ a type of homeobox gene, is responsible for dorsal- ventral patterning

Engrailed

5

Types of Hair

Laguno
Vellus
Terminal
Miniaturized

6

___________ occurs where the inner root sheath begins to slough. Des- moglein expression markedly changes here as well, and trichilemmal or pilar cysts retain these characteristics

Trichilemmal keratinization

7

The Huxley layer is two to four cell layers thick and keratinizes above the Henle layer at the region known as ______________.

Adamson fringe

8

nside the cuticle, the cortex com- prises the bulk of the shaft and contains melanin. The cortex is arranged in large cable-like structures called ___________.

macrofibrils

9

KGF means

keratinocyte growth factor

10

hair follicle and consists of an inner basement membrane called the __________ and an outer connective tissue sheath.

hyaline or vitreous (glassy) membrane