Hair Flashcards
Integumentary System
1
Q
Arrector Pili
A
Smooth muscle
2
Q
Functions of hair
A
Warmth and protection of the scalp
3
Q
Three Concentric Layers
A
Medulla (core), cortex (surrounds medulla), and cuticle (single layers overlapping)
4
Q
Types of hair
A
Vellus (fine, short hairs), intermediate hairs, and terminal (longer, courser hair)
5
Q
Hair growth
A
Average 2mm/week
Active - growing
Resting phase then shed
6
Q
Hair loss
A
Thinning (age related)
Male patterned baldness
7
Q
Hair color
A
Amount of melanin for black or brown; distinct form of melanin for red
8
Q
White
A
Decreased melanin and air bubbles in the medulla
9
Q
Hair / hair follicle
A
Genetically determined though influenced by hormones and environment
