The Only Molecules That Can Pass Freely Through the Plasma

question 36

Multiple Choice

The only molecules that can pass freely through the plasma membrane are ones that

• A) are positively charged.
• B) are small and hydrophobic.
• C) are ones that are polar.
• D) are small and polar.
• E) are small and negatively charged.

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Definitions:

Stone Weight

A unit of weight commonly used in some countries, equivalent to 14 pounds or about 6.35 kilograms.

Shear

A force that causes parts of a material to slide past one another in opposite directions, relevant in understanding earthquake mechanisms.

Compression

The process of reducing the volume of a material by applying pressure, or in geology, the stress state in which rock is pressed together, increasing its density.

Tension

A force that stretches material or causes it to be pulled apart.