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WorksheetsExocrine Pancreas (Pathophysiology exam 2)
Total questions: 59
Worksheet time: 35mins
Does the pancreas function as an endocrine or exocrine organ?
endocrine
exocrine
sneaky sneaky. it's both
Pancreatic juice contains a number of enzymes, some of which are initially secreted as __________ in an inactive form
elements
zymogens
kinases
Generally speaking, disorders interfering with normal pancreatic enzyme activity cause:
fat maldigestion
steatorrhea (fatty stools)
excess insulin production
excess glucagon production
Can exocrine and endocrine pancreatic dysfunction occur together in some patients?
yes
no
Select the four sections of the pancreas
head
neck
body
tail
abdomen
Which part of the pancreas is the thickest part of the gland including the ucinate process, which is the portion of the head that extends dorsally and to the left, behind the superior mesenteric vessels?
head
neck
body
tail
Which part of the pancreas connects the head and body and sits immediately ventral to the superior mesenteric vessels?
head
body
tail
neck
Which part of the pancreas is situated transversely in the retroperitoneal space, bordered superiorly by the splenic artery and dorsally by the splenic vein?
head
neck
body
tail
Which part of the pancreas is less fixed in the retroperitoneum and extends toward, and often immediately adjacent to the helium of the spleen?
head
neck
body
tail
What is the most common congenital anomaly of the pancreas?
pancreas divisum
ectopia
hypoplasia
annular pancreas
Choose the descriptions and symptoms of pancreas divisum
embryologic ventral and dorsal components of the pancreas fail to fuse, leaving 2 distinct ductal systems that do not communicate and that separately drain into the duodenum through 2 different papillae
can cause relative obstruction to the flow of pancreatic juice and may be associated with the development of pancreatitis
most cases are asymptomatic
Zymogen granules containing digestive enzymes are found in acinar cells. The number of zymogen granules in the cells varies- ______ are found during fasting and _____ after a meal
more, fewer
fewer, more
Is the pH of pancreatic juices acidic or basic?
acidic
basic
Why is the pH of pancreatic juices basic?
to neutralize the gastric acid entering the duodenum from the stomach
to keep the juices coming from the stomach moving through the intestines quickly
The primary function of the pancreas is (a) .
After digestion, the remaining enzymes are secreted as ____________ proenzymes or zymogens (trypsinogen, chymotrypsinogen, proelastase, procarboxypeptidase, and phospholipase A2)
inactive
active
The inactive proenzymes and zymogens that are secreted after digestion are activated in the _____________.
lumen of the proximal intestine
epithelia of the proximal intestine
What enzyme coverts trypsinogen to trypsin?
enteropeptidase
pepsinidase
secretin
gastrin
_________ converts all remaining proenzymes into active enzymes.
gastrin
secretin
trypsin
Which two hormones appear to have a primary role in the secretion of pancreatic enzymes?
secretin
cholecystokinin (CCK)
gastrin
trypsin
What triggers the release of gastric acid?
gastrin
secretin
trypsin
products of protein digestion in the duodenum
Secretin acts chiefly on the pancreatic ductal epithelial, centroacinar, and to a lesser extent acinar cells to produce _______- thus raising the pH of pancreatic secretions
HCO3
H2O
C3PO
The secretion of ______ also increases in response to secretin, increasing the absolute volume of pancreatic juice
H2O
HCO3
C3PO
The secretion of CCK is triggered by ___________________ (peptides, amino acids, fatty acids) when they enter the duodenum
the products of protein and fat digestion
carbohydrate digestion
trypsin
secretin
Choose the two mechanisms through which CCK controls pancreatic exocrine secretion
vagal stimulation
directly acting on pancreatic acinar cells
digestion
CCK release raises ________________ concentrations, which lead to the release of pancreatic enzymes from the zymogen granules.
intracellular Ca2+
extracellular Ca2+
intracellular Na ions
extracellular Na ions
The ________ action of secretin and CCK produces an abundant secretion of enzyme-rich and alkaline pancreatic juice.
integrated
independent
Which of the following are pancreatic disorders?
acute pancreatitis
chronic pancreatitis
pancreatic insufficiency
pancreatic tumors
Choose the characteristics of acute pancreatitis.
acute inflammation of the pancreas
destructive autodigestion of the pancreas and peri-pancreatic tissues
third most common indication for hospital admission
severe acute pancreatitis has a high mortality rate
Which of these is a cause of acute pancreatitis?
biliary tract disease
alcohol ingestion
metabolic (hyperlipidemia and diabetic ketoacidosis) and mechanical causes
drug reactions (corticosteroids, thiazide diuretics and chemo) and toxins
all of the above
Which of these is a cause of acute pancreatitis? cont.
traumatic injuries
infection (viral like hepatitis A and B, bacterial and parasitic like Ascaris)
hereditary (familial pancreatitis and cystic fibrosis)
idiopathic: no etiologic factor is identified (15-25% of patients)
all of the above
The hypothesized mechanism (biliary tract disease/acute pancreatitis) is obstruction of the common bile duct and the main pancreatic duct when a _________________ becomes lodged at the ampulla of Vater
gallstone or biliary sludge
kidney stone
What leads to parenchymal injury?
reflux of bile or pancreatic secretions
gallstones or biliary sludge
Other mechanism (biliary tract disease/acute pancreatitis) may involve ______________________ from the gallbladder to the pancreas, giving rise to inflammation
bacterial toxins or free bile acids travel via lymphatics
gallstone or biliary sludge
Alcohol or its metabolite, acetaldehyde, can have a direct toxic effect on pancreatic acinar cells, leading to _______________- by the lysosomal enzymes.
intracellular trypsin activation
extracellular trypsin activation
intracellular secretin activation
extracellular secretin activation
__________ leading to the retention of hydrolytic enzymes in the pancreatic duct and acini
inflammation of the sphincter of Oddi
inflammation of the LES
inflammation of the pyloric sphincter
Alcohol appears to increase the precipitation of pancreatic secretions to form "_________" in the small ductules
gallstones
kidney stones
protein plugs
_________ may predispose patients with alcoholism to pancreatic injury. For example, deficiencies of trace elements such as zinc or selenium occur in these patients with alcoholism and are associated with acinar cell injury.
malnutrition
obesity
____________, such as that associated with hyperparathyroidism, sarcoidosis, hypervitaminosis D or multiple myeloma may cause acute pancreatitis
marked hypercalcemia
marked hypokalemia
Pathology of metabolism related acute pancreatitis
mild cases: mild-marked gland swelling and infiltration with neutrophils, minimal-moderate tissue damage w/ no hemorrhage, suppuration may occur and result in abscess formation
severe cases: massive necrosis and liquefaction of the pancreas, predisposing to abscess formation; vascular necrosis resulting in peri-pancreatic hemorrhage (hypovolemia and shock); ascites surface, liquefied peri-pancreatic fat, blood from peri-pancreatic tissues and necrotic pancreatic debris
The central theory in acute pancreatitis has long centered on the aberrant activation of __________ and other enzymes within the pancreatic acini, causing autodigestion and a profound systemic inflammatory response
trypsinogen
pepsinogen
chymotrypsinogen
Recent evidence suggests that other events parallel to trypsinogen activation occur, such as the activation of ______, a protein complex that controls DNA transcription, which can induce acute pancreatitis in experimental models
NFKB
Cronin
FtsZ
If acute pancreatitis becomes recurring the gland may eventually become permanently damaged, resulting in ___________________-
chronic pancreatitis
pancreatic insufficiency
dehydration
malnutrition
Recent consensus criteria require two of the three criteria for diagnosis of acute pancreatitis. Choose the 3 criteria to be chosen from
abdominal pain
elevation of serum amylase or lipase (>3x the upper limit of normal)
characteristic findings on CT, MRI, or ultrasound
nausea, vomiting, fever (due to inflammation and necrosis)
Though a lab of serum amylase showing often to be 10-20 fold the normal amount, a ______________ may be a better diagnostic test b/c it's just as easy to perform, may be more sensitive, and is more specific for acute pancreatitis, and decreases to normal more slowly than amylase.
serum lipase measurement
serum albumin
What may occur in severe acute pancreatitis resulting from hypovolemia from a massive exudation of plasma and hemorrhage into the retroperitoneal space?
shock
sepsis
___________ may also result from severe acute pancreatitis and can vary from mild hypoxia to respiratory failure (acute respiratory distress syndrome [ARDS])
pulmonary complications
bronchospasms
What are pancreatic pseudocysts? (late complication of acute pancreatitis)
non-epithelium-lined cavities that contain plasma, blood, pus, and pancreatic juice
epithelium lined cavities containing plasma, blood, pus, and pancreatic juice
What is a pancreatic abscess? (late complication of acute pancreatitis)
non-epithelium-lined cavities that contain plasma, blood, pus, and pancreatic juice
an infected pancreatic pseudocyst
What happens when a pancreatic ascite forms? (late complication of acute pancreatitis)
occurs when a direct connection develops between the pancreatic duct and the peritoneal cavity
nothing, they're completely benign
Explain the difference between acute pancreatitis and chronic pancreatitis.
in acute pancreatitis the pancreas is normal prior to the attack and the pathologic changes are completely reversible if the patient survives
in chronic pancreatitis the gland is abnormal before the attack and the pathologic changes are not reversible
in acute pancreatitis the gland is abnormal before the attack and the pathologic changes are not reversible
in chronic pancreatitis the pancreas is normal prior to the attack and the pathologic changes are completely reversible if the patient survives
in chronic pancreatitis the parenchyma is chronically inflamed leading to the progressive destruction of the acini, stenosis and dilation of the ductules and fibrosis of the gland. eventually the gland's exocrine and endocrine function becomes impaired
What is the biggest cause of chronic pancreatitis?
alcoholism
smoking
Although smoking and chronic alcoholism are both independent factors for chronic pancreatitis, the combination of significant alcohol and cigarette use appears to be synergistic in augmenting the risk of chronic pancreatitis. True or false?
true
false
Can chronic pancreatitis be hereditary?
yes
no
Choose the pathophysiology of chronic pancreatitis.
maldigestion
bile acid malabsorption (may cause hypocholesterolemia)
amylase and lipase levels are normal, or even low
amylase and lipase levels are chronically high
pain which can lead to opioid tolerance and/or addiction
What is pancreatic lipase essential for?
fat digestion
carbohydrate digestion
protein digestion
Pancreatic insufficiency usually results from chronic pancreatitis in adults or _____________ in children.
cystic fibrosis
acute pancreatitis
Select potential causes of pancreatic insufficiency
cystic fibrosis in children
patients recovering from severe acute pancreatitis
pancreatic resection or carcinoma
hyper secretion of gastric acid
Choose the clinical manifestations of pancreatic insufficiency
Steatorrhea
hypocalcemia and hypophospatemia
nephrolithiasis
vitamin b12 deficiency
weight loss
