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Schwartz GI Dses > SI Ana, Histo, Physio > Flashcards

SI Ana, Histo, Physio Flashcards

1
Q

Small intestine is a tubular structure that extends from what to what

A

pylorus to cecum

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2
Q

Small intestine measurement in cm

A

4 - 6 cm

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3
Q

3 segments of small intestine

A

DJI
Duodenum
Jejunum
Ileum

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4
Q

DUODENUM JEJUNUM ILEUM

Most proximal segment of SI

A

Duodenum

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5
Q

DUODENUM JEJUNUM ILEUM

Proximal 40% of the jejunoileal segment

A

Jejunum

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6
Q

DUODENUM JEJUNUM ILEUM

Distal 60% of the jejunoileal segment

A

Ileum

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7
Q

Duodenum demarcated from the stomach by

A

pylorus

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8
Q

Duodenum demarcated from jejunum by

A

Ligament of Treitz

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9
Q

Ileum demarcated from the cecum by

A

ileocecal valve

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10
Q

Intraperitoneal or Retroperitoneal

1st part of duodenum

A

Intraperitoneal

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11
Q

Intraperitoneal or Retroperitoneal

2nd, 3rd, 4th part of duodenum

A

Retroperitoneal

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12
Q

Intraperitoneal or Retroperitoneal

Jejunum

A

Intraperitoneal

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13
Q

Intraperitoneal or Retroperitoneal

Ileum

A

Intraperitoneal

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14
Q

DUODENUM JEJUNUM ILEUM

Curves in a C shape around the head of the pancreas

A

Duodenum

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15
Q

DUODENUM JEJUNUM ILEUM

Larger circumference; thicker walls

A

Jejunum

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16
Q

DUODENUM JEJUNUM ILEUM

Smaller circumference; thin walls

A

Ileum

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17
Q

DUODENUM JEJUNUM ILEUM

Has 4 parts

A

Duodenum

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18
Q

DUODENUM JEJUNUM ILEUM

Located in the left upper

A

Jejunum

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19
Q

DUODENUM JEJUNUM ILEUM

Located in the right lower

A

Ileum

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20
Q

2nd portion of duodenum

A

Ampulla of Vater; Sphincter of Oddi

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21
Q

4th portion of duodenum

A

Ligament of Treitz

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22
Q

JEJUNUM ILEUM

More prominent plicae circularis

A

Jejunum

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23
Q

JEJUNUM ILEUM

More numerous Peyer’s patches

24
Q

JEJUNUM ILEUM

More fatty mesentery

25
JEJUNUM ILEUM Longer vasa recta
Jejunum
26
SI position
Central
27
LI position
Peripheral
28
SI septa
Complete (Valvulae conniventes/Kerckring folds/valves/)
29
LI septa
Incomplete (Haustra)
30
Most of the duodenum blood supply
Celiac artery and superior mesenteric artery
31
Distal duodenum, jejunum, ileum blood supply
Superior mesenteric artery
32
Venous Drainage of SI
Superior mesenteric vein
33
Lymph Drainage of SI
mesenteric lymph nodes ➔ cisterna chyli ➔ thoracic duct ➔ left subclavian vein
34
Innervation of SI
Parasympathetic: Vagus nerve Sympathetic: Splanchnic nerve
35
Epithelium Lamina propria Muscularis mucosae Where absorption from and secretion into the lumen occurs
Epithelium
36
Epithelium Lamina propria Muscularis mucosae Consists of connective tissue and population of cells
Lamina propria
37
Epithelium Lamina propria Muscularis mucosae Thin sheet of smooth muscle cells
Muscularis mucosae
38
finger-like projections of epithelium
Villi
39
Intestinal, epithelial cellular proliferation
Crypts (crypts of Lieberkuhn)
40
Predominant absorptive cell of the intestinal epithelium
Enterocytes
41
Produce mucin; role in mucosal defense against pathogens
Goblet cells
42
Secretory granules containing regulatory agents
Enteroendocrine cells
43
Located at the base of the crypt and contain secretory granules
Paneth cells
44
Layers of wall of the small intestine from innermost layer
Mucosa Submucosa Muscularis propria Serosa
45
Innermost layer of the SI
Mucosa
46
Layer of wall of the SI that has dense CT and a heterogeneous population of cells
Submucosa
47
Layer of wall of the SI that has extensive network of vascular and lymphatic vessels, nerve fibers, ganglion cells of submucosal (Meissner’s) plexus
Submucosa
48
Layer of wall of the SI that has outer, longitudinally-oriented layer and an inner, circularly-oriented layer of smooth muscle fibers OUTER LONGITUDINAL INNER CIRCULAR
Muscularis Propria
49
Located at the interface between SUBMUCOSA and MUSCULARS PROPRIA are ganglion cells of the of what plexus
Myenteric (Auerbach’s) plexus
50
Layer of wall of the SI consists of a single layer of mesothelial cells
Serosa
51
Layer of wall of the SI that is a component of the visceral peritoneum
Serosa
52
Glucose and galactose ENTER the enterocyte through secondary active transport via
SGLT1
53
Glucose and galactose are EXTRUDED basolaterally through facilitated diffusion via
GLUT2
54
Fructose ENTERS through facilitated diffusion via
GLUT5
55
Fructose is extruded basolaterally via
GLUT5
56
Major source of energy for enterocytes
Glutamine

Schwartz GI Dses (2 decks)

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