Nerve Cells Send Electrical Signals by Pumping Ions Across the Cell

question 58

Multiple Choice

Nerve cells send electrical signals by pumping ions across the cell membrane. What prevents the ions from freely flowing across the membrane?

• A) ion channels
• B) nonpolar interior of the phospholipid bilayer
• C) They bind to the polar ends of the phospholipid bilayer.
• D) Water only exists on the interior of the cell.

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Definitions:

Indirect Approach

The indirect approach involves presenting background and supportive information before revealing the main message or conclusion, often used in sensitive or controversial contexts.

Buffer

A temporary storage area used to manage data transfer between devices or processes that operate at different speeds or with different priorities.

Explanation

A statement or account that makes something clear by describing it in more detail or revealing relevant facts.

Positive Statement

A factual assertion that can be tested or verified, often used in economics to describe how the world is, as opposed to how it should be.