The Degree to Which a Test Measures What It Is

question 25

Multiple Choice

The degree to which a test measures what it is supposed to measure is called the ________ of the test.

• A)reliability
• B)validity
• C)consistency
• D)utility

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Definitions:

Concentration Differences

Variations in the amount of a particular substance within a given volume, leading to a gradient that can cause diffusion.

Sodium-Potassium Pump

A membrane-bound ATPase enzyme that pumps sodium out of cells while moving potassium into cells, crucial for maintaining cellular ion balance and membrane potential.

Plasma Membrane

A bi-layer of lipids and proteins that surrounds a cell, controlling the passage of substances in and out of the cell.

Membrane Potential

The electrical potential difference across a cell's plasma membrane, vital for the conduction of nerve impulses, muscle contraction, and transport processes.