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Digestive System Histology Review Practice Exam Questions & Answers.
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Digestive System Histology Review Practice Exam Questions & Answers. Four layers of the GI tract - CORRECT ANSWER 1. Mucosa (innermost) 2. Submucosa 3. Muscular coat 4. Serosa mucosa - CORRECT ANSWER inner most layer that touches food 3 sublayers: lamina epithelialis, lamina propria, l...

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  • August 8, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • histology
  • digestive system histology review practice exam qu

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  • HISTOLOGY
  • HISTOLOGY

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Digestive System Histology Review
Practice Exam Questions & Answers.

Four layers of the GI tract - CORRECT ANSWER 1. Mucosa (innermost)

2. Submucosa

3. Muscular coat

4. Serosa



mucosa - CORRECT ANSWER inner most layer that touches food

3 sublayers: lamina epithelialis, lamina propria, lamina muscularis



lamina epithelialis - CORRECT ANSWER innermost sublayer

contains enzymes for food break down

made up of simple epithelium

-squamous in the esophagus

-columnar everywhere else



lamina propria - CORRECT ANSWER middle layer of mucosa

loose connective tissue

contains vessels and lymphatic tissue



lamina muscularis - CORRECT ANSWER outermost sublayer of mucosa

double layer of smooth muscle

permits movement of mucosa



Submucosa - CORRECT ANSWER deep to the mucosa

dense irregular connective tissue

, large blood vessels

lymphatics and glands



muscular coat - CORRECT ANSWER two (or three) layers of smooth muscle

top 1/3 is skeletal muscle

internal circular layer and external longitudinal layer provide peristalsis



oblique layer - CORRECT ANSWER layer of the muscular coat found only in the stomach

band that appear as islands in the submucosa, a top the internal circular layer



internal circular layer - CORRECT ANSWER inner layer of the muscular coat with circularly disposed fibers



external longitudinal layer - CORRECT ANSWER outer layer of the muscular coat with longitudinally
orientated fibers



Serosa - CORRECT ANSWER outer most layer

loose connective tissue covered with a layer of simple squamous epithelium



Esophagus - CORRECT ANSWER contains the four major layers

simple squamous epithelium for the lamina epithelialis

thick lamina muscularis

esophageal glands in the submucosa

has skeletal and smooth muscle in the muscular coat

adventitia is the outermost layer



esophageal glands - CORRECT ANSWER glands of the esophagus in the submucosa



muscular coat of the esophagus - CORRECT ANSWER upper 1/3 is skeletal muscle

middle 1/3 is a mix

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