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A brush border of microvilli belongs to epithelium found in the .


A) pseudostratified; nasal cavity
B) simple cuboidal; esophagus
C) simple columnar; small intestine
D) stratified squamous; anal canal
E) stratified squamous; esophagus

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Astronauts in zero gravity are able to move food through their digestive tracts because


A) smooth muscle produces waves of contractions that propel material through the digestive tract.
B) skeletal muscle puts pressure on the digestive tract.
C) cardiac muscle maintains a high pressure that moves material through the digestive tract.
D) striated muscle creates a pressure gradient that forces material from one end of the digestive tract to the other.
E) skeletal muscle sphincters contract and allow materials to move through digestive tract.

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Nonkeratinized cells exfoliate from the surface of the skin.

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The secretory product of a gland is produced by its parenchyma, not its stroma.

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Collagenous fibers are very abundant in


A) blood and hyaline cartilage.
B) blood, adipose tissue, and osseous tissue.
C) ligaments, bones, and the most superficial portion of the skin.
D) tendons, ligaments, and the deeper portion of the skin.
E) areolar tissue, tongue, and bones.

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