Integument II Flashcards
Sebaceous glands
- Holocrine glands
- branched acinar glands with short ducts
- found everywhere except palms and soles
- continuously produce sebum
- released into hair follicle
- Growth is stimulated at puberty by sex hormones
Sebaceous glands continually secrete
Sebum
Sebum is released into
hair follicles
Sebaceous glands use what type of secretion
holocrine
Sweat (sudoriferous) glands are what type of glands (secretion)
-both merocrine and apocrine glands
Merocrine sweat (sudoriferous) glands
- Coiled, simple tubular secretory portions:
- Lined by simple epithelium
- Apical dark secretory cells secrete glycoproteins
- Basal clear cells secrete water and electrolytes
- Myoepithelial cells (found between the basal lamina and the basal domain of clear cells)
- Duct system consists of stratified cuboidal epithelium except in epidermis
- Cholinergic endings
Apocrine sweat (sudoriferous) glands
- found in labia major, areola, and axillary and anal regions
- secretions are thicker and more viscous than merocrine types
- excretory duct opens into hair follicle
- Adrenergic innervation
- inactive until puberty
- Special types: Ceruminous glands, Glands of Moll
What are the two special types of apocrine sweat glands
- Ceruminous glands
- Glands of Moll
apocrine sweat glands have what type of secretion
Although called apocrine the name is a incorrect interpretation that the apical domain of the secretory cells is shed during secretion. These sweat glands release their secretion by a merocrine process
Development of hair follicle
Develop from epidermis as elastic, keratinized threads
Components of hair follicle
- Root
- Free shaft
- Hair follicle
____ glands and ______ muscles are associated with hair follicles
sebaceous glands, arrector pili
Hair bulb
- Expanded lower part of hair follicle
- Matrix
- Vascularized dermal papilla
epithelial cells covering the apex of the dermal papilla give rise to the _____ of the hair. cells at the sides give rise to the hair ____.cells at the margin form the _____
Medulla of hair, Hair cortex, cuticle
Patients with _____ syndrome have silvery hair because of a mutation in the myosin Va gene involved in the transport of melanin-containing melanosomes
Griscelli
