GI 2 Flashcards

1
Q

length of small intestine

A

22-25 feet

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2
Q

Parts of the small intestine

A
  • duodenum
  • jejunum
  • ileum
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3
Q

Layers of the small intestine

A
  • smooth muscle
  • mucosal folds
  • villi
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4
Q

What is the functional unit of the small intestine?

A

villi

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5
Q

Types of smooth muscle of small intestine

A
  • longitudinal

- circular

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6
Q

Parts of the villus

A
  • columnar cells
  • goblet cells
  • microvilli
  • lamina propria
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7
Q

How long is the large intestine?

A

about 5 feet long

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8
Q

Parts of the large intestine

A
  • cecum
  • appendix
  • colon
  • rectum
  • anal canal
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9
Q

How many sphincters in the anal canal?

A

2

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10
Q

Parts of the colon

A
  • ascending
  • transverse
  • descending
  • sigmoid
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11
Q

Sphincters of the anal canal

A
  • internal

- external

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12
Q

muscle layers of the large intestine

A
  • longitudinal

- circular

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13
Q

cell layers of the large intestine

A
  • columnar epithelium
  • goblet cells
  • arteriole
  • venule
  • lymphatic
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14
Q

What are the 3 main arteries of the GI tract?

A
  • celiac artery
  • superior mesenteric artery
  • inferior mesenteric artery
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15
Q

Large and small intestine innervation

A
  • gastrocolic reflex
  • parasympathetic and sympathetic innervation
  • intrinsic innervation of intestines
  • spinal innervation
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16
Q

parasympathetic and sympathetic innervation of large/small intestines: What functions?

A
  • propulsion
  • water reabsorption
  • sodium reabsorption
  • relaxation of anal sphincter
17
Q

hormone responsible for sodium reabsorption

A

aldosterone

18
Q

relaxation of anal sphincter

A
  • control to hold and override defecation urge

- valsalva maneuver

19
Q

Intestinal digestion and absorption begins here

A

initiated in the stomach

20
Q

digestion and absorption: in small intestine

A
  • pancreatic enzymes
  • intestinal enzymes
  • bile salts
21
Q

digestion and absorption: intestinal motility

A
  • Haustral segmentation

- peristalsis

22
Q

After breakdown, contents travel ______ via the _______

A
  • liver

- portal vein

23
Q

These travel to liver via systemic circulation

A

fats

24
Q

These travel to the liver via the portal vein

A
  • carbs

- proteins

25
Q

Where does absorption take place?

A

all intestinal regions

26
Q

What is absorbed?

A
  • water
  • vitamins
  • electrolytes