Epithelial Tissues Have Polarity,with an Apical Side That Faces the Environment

question 33

Multiple Choice

Epithelial tissues have polarity,with an apical side that faces the environment and a basolateral side that faces the interior of the animal.Because of the harsh environmental exposure on the apical side,epithelial cells have a short life span of 2-6 days.Which of the following is the most likely reason that the tissue as a whole does not wear away,despite the short life spans of the cells?

• A)The epithelial tissue is unusually thick.
• B)The degraded tissue is recycled and restored to its original site.
• C)The tissue has cells that actively undergo mitosis and cytokinesis to replace the lost cells.
• D)New cells are transported in the blood to the site where old cells have worn away.

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Definitions:

RC Parallel Circuit

An electrical circuit configuration consisting of resistors (R) and capacitors (C) connected in parallel, affecting current and voltage differently.

R

Symbol commonly used to denote resistance in electrical circuits, measured in ohms (Ω).

Power Factor

The ratio of the real power flowing to the load to the apparent power in the circuit, indicating how effectively electrical power is converted into useful work output.

RC Parallel Circuit

An electrical circuit composed of resistors (R) and capacitors (C) connected in parallel, affecting the total impedance seen by an alternating current (AC) source.