Digestive Histology

Question 1

What are the three types of hepatic lobule organizations?

Answer 1

Classic
Portal
Liver Acinus

Question 2

What is the location of the portal triad?

Answer 2

Angles of classic lobule

Question 3

Portal Triad

Answer 3

3 features: interlobular bile duct, interlobular vein and interlobular artery

Question 4

Classic lobule

Answer 4

central venule is in the center of lobule….portal triads are at the angles

Question 5

Portal lobule

Answer 5

Three central venules of adjacent lobules form a triangle

Portions of the bile canaliculi of the three lobules drian into same bile duct

Question 6

Liver Acinus lobule

Answer 6

Includes three zones defined by hepatic tissue receiving blood from a branch of hepatic artery conducting blood to opposite central veins

Metabolic gradient extends from hepatic triad to central vein

Question 7

Pancreas histology

Answer 7

lobulated
compound
tubulo-alveolar
Secretory Functions: exocrine and endocrine
Connective tissue support that dividing into lobules with divisions by septas

Question 8

Intercalated ducts

Answer 8

Lined with low cuboidal cells
Cells with receptors for secretin
Secrete water and bicarbonate ions

Question 9

Pancreatic Acinus

Answer 9

Pyramidal serous cells

Precursor of pancreatic juice enzymes

Question 10

Centroacinar

Answer 10

Form truncated cuboidal epithelium within the lumen of acini
Unique to pancreas*
No striated ducts or myoepithelial cells

Question 11

What stimulates release of digestive enzymes from serous accinar cells?

Answer 11

CCK

Question 12

Secretion of bicarbonate ions and water is regulated by ____

Answer 12

secretin

Question 13

A-cells or ____ have

Answer 13

alpha cells have fine cytoplasmic granules and presumed to form glucagon

Question 14

B cells or ____ have

Answer 14

beta cells have cytoplasmic granules. More numerous and produce insulin

Question 15

D cells or ___ have

Answer 15

delta cells secrete somatostatin helping to control levels of insulin and glucagon