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Digestion III
Lecture 3 Dr. Markos UCC
27
Physiology
Undergraduate 1
03/13/2017

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Term
Name the 3 pairs of salivary glands
Definition
parotid
Submandibular
Sublingual/submaxillary
Term
Which of the following cell types is not present in the exocrine glands.

Serous acinar cells
Glial cells
mucous acinar cells
Definition
Glial cells
Term
What is secreted by serous acinar cells
Definition
water, inorganic salts, salivary amylase
Term
What cell types secrete glycoprotein mucin?
Definition
Mucous acinar cells
Term
The salivary gland is an exocrine gland
Definition
True
Term
Function of saliva that is not lubrication or starch breakdown
Definition
Immunglobulins for defence
Term
The primary secretion is in the duct of the exocrine gland
Definition
False. Acinar cells are in the bulb not in the duct.
Term
Name the ions in saliva
Definition
Sodium, potassium, chloride and bicarbonate
Term
The concentration of potassium and bicarbonate in saliva is the same as in plasma
Definition
False. Higher concentrations of these ion in saliva.
Term
Name the inorganic ions that are extracted in the duct cells
Definition
sodium and chloride
Term
The primary secretion is isotonic
Definition
True
Term
Name the division of the ANS that predominantly controls saliva secretion
Definition
Parasympathetic
Term
Atropine increases saliva secretion.
Definition
False. Atropine is a mAChr antagonist which will inhibit atropine secretion.
Term
Name the main component of the aqueous part of pancreatic juice
Definition
Bicarbonate
Term
Name the non-aqueous component of pancreatic juice and give its function
Definition
Enzyme
digestion of fats, carbs and proteins
Term
Secretin stimulates release of pancreatic juice via second messenger
Definition
True
Term
Chyme in the duodenum stimulates reflex secretion of pancreatic juice and bile
Definition
True
Term
Name the transporter through which chloride diffuses into the duct gland of the pancreas
Definition
cystic fibrosis transmembrane conductance regulator
Term
How is bicarbonate produced in the duct cells of the exocrine pancreas?
Definition
CO2 diffuses into the cell. Combines with water to produce carbonic acid. This then disociates into bicarbonate and a proton.
Term
Name the ion that is counter-transported with bicarbonate in the duct of the exocrine pancreas
Definition
Chloride
Term
Enzymes are secreted in the inactive form from the pancreatic acinar cells
Definition
True
Term
Name the enzyme that activates proteases in the duodenum
Definition
enterokinase
Term
Carboxypeptidase, trypsin and chymotrypsin are secreted in pancreatic juice
Definition
True
Term
Other that proteases name 2 enzymes secreted by the exocrine pancreas
Definition
Lipase
Alpha-amylase
Term
Pancreatic trypsin inhibitor prevents small amounts of active trypsin in the pancreas from becoming active within the pancreas
Definition
True
Term
Distension of the stomach stimulates reflex pancreatic secretion
Definition
True. Gastropancreatic Reflex
Term
Name 3 phases of pancreatic secretion
Definition
Cephalic (25%)
Gastric (10%)
Intestinal (65%)
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