The Function of a Tight Junction Within Epithelial Tissue Is

question 84

Multiple Choice

The function of a tight junction within epithelial tissue is to

• A)assure that material has to pass through rather than between epithelial cells.
• B)assure that material is captured by phagocytes before entering a cell.
• C)assure that material is channeled between cells rather than into them.
• D)prevent the dissolution of a cell's plasma membrane.
• E)channel substances away from an epithelium rather than toward it.

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Definitions:

Achiral

Describes a molecule that is superimposable on its mirror image, lacking chirality and, therefore, lacking enantiomers.

Diastereomers

Stereoisomers which are not reflections of one another and possess distinct physical and chemical characteristics.

Cis-1,2-dimethylcyclopentane

An isomer of dimethylcyclopentane where the two methyl groups are on the same side of the ring structure, leading to specific stereochemical properties.

Trans-1,2-dimethylcyclopentane

An isomer of dimethylcyclopentane characterized by the two methyl groups being on opposite sides of the cyclopentane ring.