(1) myoepithelial cells (2) striated epithelial cells (3) stratified cuboidal epithelium (4)
serous demilunes
22. The following statements regarding the striated ducts of the salivary glands are
true:
(1) are lined with simple cuboidal or columnar epithelium (2) their cells have basal
striations (3) may be surrounded by small amount of connective tissue (4) are intralobular
ducts
23. The following statements regarding the basal striations of the striated duct
epithelial cells of the salivary glands are true:
(1) consists of numerous infoldings of the basal plasmalemma (2) contains longitudinally
oriented mitochondria (3) reabsorbs sodium from the secretion (4) adds potassium to the
secretion
16. DIGESTIVE SYSTEM
– II
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 gastric mucosa is true, EXCEPT:
A
– gastric pits form its microrelief; B – is covered with simple columnar mucous
epithelium; C
– possesses its own nerve plexus; D – its lamina propria contains simple
tubular glands; E
– its muscularis mucosae consists of three muscle layers.
2. Each of the following statements concerning the gastric fundic glands is true,
EXCEPT:
A
– occur in the submucosa; B – are simple tubular and slightly branched; C – secrete
gastric juice; D
– consist of five cell types; E – open into gastric pits.
3. The gastric fundic glands consist of the following cells, EXCEPT:
A
– chief cells; B – parietal cells; C – mucous neck cells; D – enteroendocrine cells; E –
goblet cells.
4. Each of the following statements concerning the parietal cells of the gastric
glands is true, EXCEPT:
A
– secrete hydrochloric acid; B – secrete pepsinogen; C – their activity is stimulated by
gastrin, histamine, and acetylcholine; D
– secrete an intrinsic factor; E – their intrinsic
factor is essential for vitamin B
12
absorption.
5. Each of the following statements concerning the pyloric region of the stomach is
true, EXCEPT:
A
– pyloric gastric pits are deep and occupy about half of the mucosa thickness; B –
pyloric glands are tubular branched; C
– mucous cells are predominant in pyloric glands; D
– pyloric glands contain parietal cells; E – its muscularis externa is very thick.
6. Each of the following statements concerning the undifferentiated cells of the
gastric glands is true, EXCEPT:
A
– are located mainly in the neck region of the glands; B – are absent in the pyloric
glands; C
– give rise to all glandular cell types; D – serve for renewal of gastric surface
epithelium; E
– their descendants migrate upwards along the pit and are shed at the
luminal surface.
7. Each of the following statements concerning the intestinal villus is true, EXCEPT:
A
– its core consists of connective tissue; B – contains fenestrated sinusoidal blood
capillaries; C
– contains a blind-ending lymphatic capillary called the lacteal; D – smooth
muscle cells derived from muscularis mucosae extend to the villus and accompany the
lacteal; E
– lacks the covering epithelium.
8. Each of the following statements concerning the enterocytes of the small
intestine epithelium is true, EXCEPT: