Digestive Tract Glands Flashcards
What is the Merocrine secretory mechanism?
Most common - Exocytosis of secretory vacuoles. No loss of cellular components. Ex) parotid, pancreas, sweat glands.
What is the Apocrine secretory mechanism?
Cells are pinched off from membrane. Some cytoplasm is lost. Ex) mammary, prostate, eye lid
What is the Holocrine secretory mechanism?
The cell disintegrates and everything in it become gland secretion –> eventual apoptosis. Ex) sebaceous gland of skin
What are the 3 major salivary glands? Describe each.
1) Parotid - largest, under ear, opens inside cheek near parotid papilla
2) Submandibular - under mandible, makes 70% saliva, opens under tongue
3) Sublingual - pair, smallest, under tongue
What are the 3 types of secretory acini?
1) Serous
2) Mucous
3) Mixed - serous demilune
What are the exocrine glands of the digestive system?
Salivary glands, pancreas, liver, and gallbladder.
What are the 3 functions of saliva?
Lubrication, digestion, immunity, mineralization.
Intralobular ducts are also known as what?
Secretory duct
Interlobular ducts are also known as what?
Excretory duct
What type of acini make up the parotid gland? And what does this gland secrete and by which cell?
Serous acini; IgA part of saliva made by plasma cells
What type of acini make up the submandibular gland?
Mixed - serous demilunes
What type of acini make up the sublingual gland?
Mixed but mostly mucous; serous demilunes
What are the salivary gland diseases?
Obstructive, infectious, immunological, tumors (parotid most affected)
Out of 100%, what type of gland is the pancreas?
98% exocrine and 2% endocrine
The digestive enzymes and bicarbonate ions - or pancreatic juice - are made from which part of the pancreatic gland?
Exocrine or serous gland.