Which of the Following Statements About Epithelial Cells or Epithelial

question 69

Multiple Choice

Which of the following statements about epithelial cells or epithelial transport is NOT correct?

• A)Epithelial cell membranes express different transport proteins on different cell surfaces.
• B)Epithelial cells lining the small intestine have Na⁺⁻K⁺-ATPase pumps only in their basolateral membranes.
• C)The plasma membrane of epithelial cells that face the inside of a hollow or fluid-filled chamber in the body is called the basolateral membrane.
• D)The pathway taken by substances that flow between epithelial cells is called the paracellular pathway.
• E)When substances cross epithelial barriers by going through the cell membranes and cytosol,it is called the transcellular pathway.

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Definitions:

Dienophile

A compound that is attracted to dienes, participating in Diels-Alder reactions to form cyclic compounds.

Anthocyanidins

Plant pigments that belong to the flavonoid group, responsible for the red, purple, and blue colors in many fruits and flowers.

pH Titrations

Analytical methods used to determine the concentration of an acid or base in a solution by gradually adding a known concentration of titrant until the reaction reaches its equivalence point, indicated by a pH change.

Major Organic Product

The primary product of a given organic reaction that is formed in the largest quantity, often the focus of synthetic interest.