(1) gastric peristalsis (2) chyme passing into the duodenum (3) plication of the gastric
mucosa (4) outflow of gland secretion
20. The amplification of the small intestine mucosa surface for digestion and
absorption is provided by:
(1) plicae circulares (2) intestinal villi (3) microvilli of enterocytes (4) goblet cells
21. The following statements regarding the microvilli of the small intestine
epithelium are true:
(1) are small finger-like projections of the enterocyte apical plasma membrane (2) microvilli
appear as a “striated border” (3) provide major surface amplification for digestion and
absorption (4) the striated border is broken off over goblet cells
22. The following statements regarding the crypts of the small intestine mucosa are
true:
(1) are epithelial invaginations into the lamina propria (2) extend through the lamina
propria thickness up to the muscularis mucosae (3) are tubular structures (4) open onto
the luminal surface at villus bases
23. The following statements regarding the intestinal goblet cells are true:
(1) contain mucinogen granules in the apical distended portion (2) contain organelles and
nuclei in the narrow basal portion (3) produce mucus (4) are located only in intestinal villi
24. The epithelium of the small intestine villi contains the following cells:
(1) absorptive cells (2) goblet cells (3) endocrine cells (4) Paneth cells
25. The epithelium of the small intestine crypts contains the following cells:
(1) goblet cells (2) intermediate cells (3) Paneth cells (4) endocrine cells
26. The following statements regarding the gut-associated lymphatic tissue are true:
(1) lymphocytes infiltrate the mucosal epithelium and the lamina propria (2) lamina propria
contains lymphatic nodules and Pejer’s patches (3) epithelial M cells transport antigens
from the gut lumen to lymphocytes (4) antigens stimulate lymphocytes for immune
response
27. The following statements regarding the gut-associated lymphatic tissue are true:
(1) after antigen stimulation lymphocytes migrate to lymphatic nodes and differentiate into
plasma cells (2) plasma cells secrete IgA (3) enterocytes produce secretory glycoprotein
(4) the IgA-secretory glycoprotein complex passes into the lumen to inactivate antigens
17. DIGESTIVE SYSTEM
– III
Directions
: each of the following statements contains five suggested completions. Choose
the one that is best in each case.
1. Each of the following statements concerning the large intestine mucosa is true,
EXCEPT:
A
– contains numerous crypts; B – forms villi; C – its surface epithelium is the same as that
of the small intestine; D
– goblet cells are more numerous in its epithelium than in the
small intestine; E
– Paneth cells are normally absent in its crypts.
2. Each of the following statements concerning the liver circulation is true, EXCEPT:
A
– the liver receives blood from the portal vein and the hepatic artery; B – blood is mixed
in sinusoidal capillaries; C
– capillaries empty into central veins; D – central veins lead to
sublobular veins; E
– sublobular veins carry blood into the portal vein.
3. Each of the following statements concerning the classic hepatic lobule is true,
EXCEPT:
A
– is a hexagonal block of tissue; B – triads are at its angles; C – the sublobular vein is its
centre; D
– cell plates radiate from its centre to the periphery; E – sinusoids carry blood
from the periphery to the centre.