Dead skin cells are shed in thin sheets because they are held together by spots of proteoglycan reinforced by intermediate filaments. Such strong intercellular connections are called
A) gap junctions.
B) intermediate junctions.
C) tight junctions.
D) desmosomes.
E) junctional complexes.
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Question 2) A type of intercellular junction that stops materials from crossing an epithelium between cells is called a(n)
A) tight junction.
B) gap junction.
C) intermediate junction.
D) desmosome.
E) hemidesmosome.
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Question 3) The junction type that lets neighboring cells exchange small molecules is the
A) desmosome.
B) hemidesmosome.
C) gap junction.
D) tight junction.
E) zonula adherens.
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Question 4) An epithelial cell can be divided into two functional regions. They are the ________ and the basal surface.
A) apical
B) pinnacle
C) topical
D) crest
E) apogeal
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Question 5) Close examination of a healthy organ reveals a lining of several layers of cells. The layers do not contain any blood vessels and one surface of the cells lines the cavity of the organ. This tissue is a type of
A) epithelium.
B) muscle tissue.
C) connective tissue.
D) neural tissue.
E) fat tissue.
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Question 6) Epithelial cells that are adapted for absorption usually have ________ at their free surface.
A) mitochondria
B) cilia
C) microvilli
D) junctional complexes
E) Golgi complexes
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Question 7) Epithelial cells that line the small intestine transport nutrients into the body. Directional transport is associated with the epithelial tissue property of
A) avascularity.
B) regeneration.
C) cellularity.
D) polarity.
E) attachment.
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Question 8) Characteristics of epithelia include all of the following except
A) attachment.
B) avascularity.
C) regeneration.
D) polarity.
E) extracellular matrix.
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Question 9) The tissue that always has an apical and a basal surface is ________ tissue.
A) epithelial
B) connective
C) muscle
D) basal
E) apical
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Question 10) Any substance that enters or leaves your body must cross
A) muscle tissue.
B) connective tissue.
C) secretory tissue.
D) neural tissue.
E) epithelial tissue.
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