Flashcards in Exocrine glands Deck (36):
Exocrine glands are derived from what type of tissue?
How are exocrine glands classified?
1. Type of secretion2. Mode of secretion3. Cell numbers
What do mucous glands secrete?
What is mucin?
What are examples of mucous glands?
1. Goblet cells2. Mucous cells
What are mixed glands?
Contain serous and mucous secretory uits
What are examples of mixed glands?
1. Submandibular gland2. Sublingual gland
What are characteristics of merocrine secretion?
1. Exocytosis2. No loss of plasmalemma or cytoplasm3. Most common
What are characteristics of apocrine secretion?
1. Secretory product is released along with apical cytoplasm and apical plasmalemma
Mammary glands use what type of secretory gland process for lipids?
What are characteristics of holocrine secretion?
The entire cell and its secretory product is released
Sebaceous glands use what type of secretory gland process?
What are the two shapes of secretory units?
1. Acinus (aka alveolar)2. Tubular
What are examples of simple duct systems that do not have an excretory duct?
Stomach / intestinal glands
What are two types of intralobular ducts?
1. Intercalated 2. Striated
What are myoepithelial cells?
Contractile cells derived from epithelium
Myoepithelial cells contain what types of filaments?
Actin and myosin
How would you confirm the epithelial origin of myoepithelial cells?
Where are myoepithelial cells located?
Surround the secretory units of many multicellular glands (mamary, sweat, large salivary) and small ducts and share their basal lamina
How are myoepithelial cells connected to epithelial cells?
Desmosomes and gap junctions
What is the classification of the parotid gland?
Is the parotid gland purely serous, purely mucous, or mixed?
What kind of intralobular ducts does the parotid gland have?
Intralobular and intercalated
What is the classification of the submandibular gland?
Is the submandibular gland purely serous, purely mucous, or mixed?
Mixed, but mostly serous (demilune parts)
Are serous demilunes present in living tissue?
What are the characteristics of the intralobular ducts in the submandibular gland?
Prominent striated ducts, short intercalated ducts
What is the classification of the sublingual gland?
Is the sublingual gland purely serous, purely mucous, or mixed?
Mixed, but mostly mucous (serous demilunes are sparse)
What are the characteristics of the intralobular ducts in the sublingual gland?
Less developed than those of other salivary glands
What are some symptoms of Sjogren syndrome?
Dry eyes, dry mouth, dysphagia, dysphonia, difficulty tasting, cracked lips, parotid enlargement by 50%
What is the classification of the pancreas?
The pancreas is most similar to what other gland?
What differentiates the pancreas from the parotid gland?
1. Islets of Langerhans2. Centroacinar cells3. Absence of striated ducts
What feature is unique to the pancreas?