Histology of Digestive Glands Flashcards by Joan Ravalo

What is an acinus?

group of secretory cells arranged

around a narrow lumen

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Short, branching tubular glands lined with mucous

cells that secrete saliva continuously to moisten and lubricate oral mucosa

minor salivary glands

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False about major salivary glands
A. Branched acinar
B,Secrete in response to sympathetic activity
C. Come in pairs

B,Secrete in response to sympathetic activity

dapat parasympathetic`

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False about mucous acini
A. Visible lumen
B. Secretion is called mucin (mucus), made up of glycoproteins
C. dark-staining in H&E stain

c. dark-staining in H&E stain

light-staining dapat

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crescentic layers of serous cells capping

the ends of the mucous acini

serous demilunes

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Contractile cells that embrace both serous and

mucous acini; Force secretions from the lumen to the duct system

myoepithelial cells

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amylase is from (serous, mucous) secretions

serous

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false about intercalated ducts
A) Lined by low cuboidal epithelial cells
B) have stem cell capability
C)Well-developed and striated in mucous glands and
Poorly-developed and non-striated in serous
glands
D)secrete bicarbonate into the acinar product and absorb chloride from the acinar product

C)Well-developed and striated in mucous glands and
Poorly-developed and non-striated in serous
glands

dapat: Well-developed and striated in serous glands and
Poorly-developed and non-striated in mucous
glands

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ducts where sodium is reabsorbed from the primary secretion + potassium & bicarbonate secretion into the secretion

striated duct

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Striated ducts located in the parenchyma of the

glands (connective tissue)

intralobular duct

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salivary duct that Passes through the connective tissue stroma of the glands

interlobular duct

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False about main duct
A. Opens into oral cavity
B. Larger duct systems can bring saliva back to the glands that produced them

B. Larger duct systems can bring saliva back to the glands that produced them

They can only bring saliva out. Once saliva is out, it can never go back

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Sequence the parts of the salivary ductal system (from interior to exterior)
A.main
B.interlobar
C.intercalated
D.intralobar
E.striated

C then E then D then B then A

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False about parotid glands:
A.Largest of the major salivary glands
B.Secretions are watery serous saliva rich in amylase,
proline-rich proteins
C. dark-staining at H&amp;E
D. duct involved: Wharton's Duct

D. duct involved: Wharton’s duct

Stenson’s dapat. Wharton’s: for submandibular

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False about sublingual glands:
A.Smallest of the salivary glands
B.Located underneath the tongue
C.intercalated ducts and striated ducts are short,
difficult to locate, or sometimes absent
D.have watery secretions

D.have watery secretions

Parotid gland: has watery secretions
Sublingual gland: has viscous secretions

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Submandibular Glands (2)
A.Located beneath the mandible on either side of the
midline
B, Ducts open onto the floor of the mouth near the
frenulum of the tongue
C.Contain both serous and mucinous acini
(predominantly mucous), depicted as serous demilunes
D.duct involved: Stenson’s duct

D.duct involved: Stenson’s duct

Wharton’s dapat. Stenson’s: for parotid gland

[PANCREATIC ACINI SECRETION CONTROL]

Bile secretion stimulated by ___
Enzyme activation by _____

Cholecystokinin

Enterokinase

Function of enterokinase

protection against activation of
enzymes outside the small intestine to prevent
damage of pancreas

Bicarbonate secretion of pancreatic duct system stimulated by ___

secretin

What is the part of the pancreatic duct system that…

a. Line lumen of the acinus
b. Secrete large amounts of bicarbonate
c. is Pale-staining, low cuboidal/squamous

centroacinar cells

Main pancreatic duct is called: ____

accessory pancreatic duct is called: ___duct

Main pancreatic duct is called duct of Wirsung

accessory pancreatic duct is called: duct of Santorini

Sequence the pancreatic duct system parts:
A.interlobar
B.main
C.intercalated
D.intralobular

C,D,A,B

True or false: The pancreas synthesizes and secretes numerous plasma
proteins into the bloodstream:

False. The liver does this.

Hepatic sinusoids are ducts between hepatocytes that

collect bile. True or false?

False. Bile canaliculi are ducts between hepatocytes that

collect bile.

``` Blood vessels in the liver that receive the following: * Oxygenated blood from hepatic artery * Deoxygentaed nutrient-rich blood from hepatic portal vein ```

hepatic sinusoids

True or false: Hepatic portal vein collects blood that has passed through the liver which is then emptied into the inferior vena cava.

False. Hepatic vein ang gumagawa nito.

blood vessel in the liver that supplies poorly-oxygenated blood that has already circulated through the intestines, and is rich in absorbed nutrients

hepatic portal vein

Deep fissure that contains: Hepatic portal vein, Hepatic artery, Common bile duct

porta hepatis

True or false: Bile flows in the same way that blood does.

False. Bile flow is opposite blood flow.

False about Classic Lobule Model i. Shape: Triangular ii. Center: Central Vein iii. Corners: Portal Triad

i. Shape: Triangular Hexagonal dapat.

Portal Lobule (Model: Bile Secretion) i. Shape: Triangular ii. Center: Portal Triad iii. Corners: Hepatic sinusoids

iii. Corners: Hepatic sinusoids central vein dapat

Zones of Oxygenation @ Liver Acinus Model Which is true? 1. Zone 1 encircles the portal tracts; receives most O2 and nutrients 2. Zone 2 is located around central veins, where oxygenation is poor 3. Zone 3 is located in between.

1. Zone 1 encircles the portal tracts; receives most O2 and nutrients Zone 2 is between Zone 1 and Zone 3, the oxygen-poor region that is near the central vein

perisinusoidal space between basal surfaces of the endothelial cells and the surfaces of the hepatocytes

Space of Disse

principal bile pigment; derived | from heme of recycled RBC’s

bilirubin

The gall bladder does not just store bile; it absorbs __ and ions to concentrate bile

water