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GI - Pancreas

hanna sayedi 26 questions

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Questions in this quiz (26)

  1. 1Describe the functional anatomy of the exocrine pancreas

    Groups of [blank_start]acini[blank_end] ([blank_start]sac-like cavity[blank_end] in a gland, surrounded by [blank_start]secretory cells[blank_end])
    [blank_start]Simple cuboidal epithelium[blank_end] surrounding an [blank_start]excretory duct[blank_end]
    Several excretory ducts [blank_start]combine with increasing dimension[blank_end] to terminate as [blank_start]pancreatic duct[blank_end] / [blank_start]accessory pancreatic duct[blank_end]
    1. Aacini
    2. Bsac-like cavity
    3. Csecretory cells
    4. DSimple cuboidal epithelium
    5. Eexcretory duct
    6. Fcombine with increasing dimension
    7. Gpancreatic duct
    8. Haccessory pancreatic duct
  2. 2What does the microscopic structure of endocrine pancreas consist of

    lots of isolated clumps of [blank_start]cells surrounding a capillary[blank_end] (islets of Langerhans)

    2 Major functions
    • [blank_start]Digestion[blank_end] ([blank_start]exocrine pancreas[blank_end])
    • Regulation of [blank_start]metabolism[blank_end] ([blank_start]endocrine pancreas[blank_end])
    1. Acells surrounding a capillary
    2. Bendocrine pancreas
    3. CDigestion
    4. Dexocrine pancreas
    5. Emetabolism
  3. 3Explain the regulation of the exocrine pancreas and its role in digestion

    [blank_start]Pancreatic juice[blank_end] - 2 major components

    [blank_start]HCO3-[blank_end] to [blank_start]neutralise stomach acid[blank_end] thereby protecting small intestinal mucosa

    Also provide the [blank_start]correct pH[blank_end] for digestive enzymes to function

    Enzymes to [blank_start]digest food material[blank_end] for [blank_start]absorption in the small intestine[blank_end]
    Involved in [blank_start]carbohydrate / protein / fat[blank_end] digestion
    1. APancreatic juice
    2. BHCO3-
    3. Cneutralise stomach acid
    4. Dcorrect pH
    5. Edigest food material
    6. Fabsorption in the small intestine
    7. Gcarbohydrate / protein / fat
  4. 4What is the relevance of pancreatic juice in the horse/pig

    substantial amounts of pancreatic juice produced – create large [blank_start]intestinal environment[blank_end] suitable for [blank_start]fermentation[blank_end].
    - equivalent to [blank_start]saliva[blank_end] production in ruminants
    1. Aintestinal environment
    2. Bfermentation
    3. Csaliva
  5. 5What is the Ionic composition of Pancreatic juice
    Similar to [blank_start]blood[blank_end]
    • [blank_start]HCO3-[blank_end] actively transported into duct lumen in exchange for [blank_start]Cl-[blank_end]
    • Water follows by [blank_start]osmosis[blank_end]
    • [blank_start]H+[blank_end] correspondingly transported into [blank_start]blood stream[blank_end]
    • Negates the [blank_start]alkaline tide[blank_end]
    • At normal flow rates [blank_start]HCO3-[blank_end] reabsorbed into [blank_start]acinar cells[blank_end]
    • At [blank_start]high flow rates[blank_end] (eg during digestion) not enough time for [blank_start]HCO3-[blank_end] reabsorption so [blank_start]pancreatic juice[blank_end] remains highly [blank_start]alkaline[blank_end]
    • [blank_start]Na+ / K+[blank_end] composition constant whatever the flow rate
    1. Ablood
    2. BHCO3-
    3. CCl-
    4. Dosmosis
    5. EH+
    6. Fblood stream
    7. Galkaline tide
    8. Hacinar cells
    9. IHCO3-
    10. Jhigh flow rates
    11. KHCO3-
    12. Lpancreatic juice
    13. Malkaline
    14. NNa+ / K+
  6. 6What is the Enzymatic composition of pancreatic juice
    • Secretion of [blank_start]digestive enzymes[blank_end] for c[blank_start]arbohydrate / fat / protein[blank_end] breakdown
    • Proteases secreted in [blank_start]inactive[blank_end] form to prevent auto-digestion (as in stomach)
    • Amylase breaks down [blank_start]starch[blank_end] (continues where salivary amylase left off!) to [blank_start]maltose[blank_end]
    • Lipases / phospholipases break down fat to [blank_start]glycerol / fatty acids[blank_end]
    1. Adigestive enzymes
    2. Barbohydrate / fat / protein
    3. Cinactive
    4. Dstarch
    5. Emaltose
    6. Fglycerol / fatty acids
  7. 7What happens to trypsinogen
    • Duodenal epithelial surface contains [blank_start]enteropeptidase[blank_end]
    Trypsinogen ⇒ [blank_start]Trypsin[blank_end]
    • [blank_start]Trypsin[blank_end] auto-catalyses itself as well as [blank_start]activating other proteases[blank_end]
    1. Aenteropeptidase
    2. BTrypsin
    3. CTrypsin
    4. Dactivating other proteases
  8. 8What do pancreatic cells produce
    “[blank_start]trypsin inhibito[blank_end]r” to prevent [blank_start]auto-digestion[blank_end]
    1. Atrypsin inhibito
    2. Bauto-digestion
  9. 9What are the 3 stages of digestion
    • [blank_start]Cephalic[blank_end] phase
    • [blank_start]Gastric[blank_end] phase
    • [blank_start]Intestinal[blank_end] phase
    1. ACephalic
    2. BGastric
    3. CIntestinal
  10. 10How is cephalic /gastric phase mediated
    mediated by [blank_start]vagus / gastrin[blank_end]
    • [blank_start]Carnivores[blank_end] - only enzymatic component
    • [blank_start]Horse / Pig[blank_end] - ionic component as well (for large intestinal fermentation)

    1. Avagus / gastrin
    2. BCarnivores
    3. CHorse / Pig

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Description
GI (GI) Quiz on GI - Pancreas , created by hanna sayedi on 29/01/2019.
Language
English
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gi gi
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