Chap 3 Histology&Physiology Flashcards
What kinds of sensations can nerve sensors detect?
Heat, cold, touch, pain, and pressure
What is the skin’s mechanism that protects from irritation and dehydration?
Barrier function.
How does estrogen affect the skin?
Anti-inflammatory, antioxidant, provides skin moisture, aids in tissue repair
What is not an element of the skin’s acid mantle?
Blood
What causes injured skin to restore itself to its normal thickness?
Hyperproduction of cells
What are follicles?
Tubelike openings in the epidermis
What are hair papillae?
Cone-shaped elevations at the base of the follicle
What is the acid mantle?
Protective layer of lipids and secretions on the skin’s surface
What are ceramides?
Glycolipid materials
What is collagen?
Fibrous tissue made from protein
Dermal papillae are membranes of ….
Ridges and grooves that attach to the epidermis.
What is the formal name for the horny layer of the skin?
Stratum corneum
Which is the outermost layer of the skin?
Stratum Corneum
What happens in the stratum germinativum?
Cells divide
What happens in the stratum granulosum?
Keratin is produced
What part of the skin’s mechanism that provides a protective cushion and energy storage for the body?
Subcutaneous layer
What is the dermis?
Support layer below the epidermis
Which is the outermost layer of the skin?
Epidermis
How is B-Keratin different from A-Keratin?
It has lower moisture and fat than A-Keratin.
What percentage of hard B-Keratin does hair contain?
90%
