Which of the Following Makes It Necessary for Animal Cells

question 28

Multiple Choice

Which of the following makes it necessary for animal cells, although they have no cell walls, to have intercellular junctions?

• A) Cell membranes do not distinguish the types of ions and molecules passing through them.
• B) Large molecules, such as proteins and RNA molecules, do not readily get through one, much less two, adjacent cell membranes.
• C) Cell-to-cell communication requires physical attachment of one cell to another.
• D) Maintenance of tissue integrity and barriers to fluid leakage requires cells to adhere tightly to one another.

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Definitions:

Absolute Threshold

The smallest level of stimulus that can be detected by the sensory systems at least half the time.

Absolute Threshold

The minimum intensity of a stimulus required to be perceptibly recognized by an individual's senses.

Absolute Threshold

The minimum intensity level of a stimulus that an individual can detect at least 50 percent of the time.

Billboard

A large outdoor advertising structure typically found in high traffic areas, displaying commercials or public messages.