Phospholipid Bilayer Membranes Are Selectively Permeable

question 44

Multiple Choice

Phospholipid bilayer membranes are selectively permeable. What does that mean?

• A) They allow everything nonpolar to cross.
• B) They allow everything but water to cross.
• C) They allow only water to cross.
• D) They allow some things to cross while restricting others.

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Definitions:

Against

In opposition to or in competition with; denotes a contrasting or conflicting situation.

Milliliter

A unit of volume in the metric system, equivalent to one-thousandth of a liter, commonly used to measure liquids.

DC

Direct Current, a type of electrical current that flows in one direction only, used in various applications including electronics and batteries.

NPO

An acronym standing for "nil per os," a medical instruction meaning to withhold oral food and fluids from a patient for a certain period.