Small Molecules, Such as Water and Many Ions, Cross the Membrane

question 641

Multiple Choice

Small molecules, such as water and many ions, cross the membrane without assistance from the cell. This movement is called ________ and requires NO energy expenditure by the cell.

• A) passive transport
• B) active transport
• C) facilitated diffusion
• D) None of the listed responses is correct.

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Definitions:

Operating Temperature

Operating temperature refers to the range of ambient temperature in which an electronic or mechanical device can function correctly and efficiently without succumbing to failures or damage.

Degrees C

A unit of measurement for temperature on the Celsius scale, denoted as "°C."

Impeller

A rotating component of a pump, blower, or compressor designed to move fluid by converting rotational energy into fluid flow.

Jet Pumps

Mechanical devices that use a high velocity jet of fluid to entrain a lower pressure fluid and raise its pressure.