Which Answer Explains Why Na+ Ions Enter the Cell When

question 48

Multiple Choice

Which answer explains why Na+ ions enter the cell when voltage-gated Na+ channels are opened in neurons?

• A) the Na+ concentration is much lower outside the cell than it is inside the cell
• B) the Na+ ions are actively transported by the sodium-potassium pump into the cell
• C) the Na+ concentration is much higher outside the cell than it is inside, and the Na+ ions are attracted to the negatively charged interior
• D) the Na+ concentration is much higher outside the cell than it is inside, and the Na+ ions are actively transported by the sodium-potassium pump into the cell

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Definitions:

Repulsion

A force between two similar or like charges that causes them to move apart.

RPM

Revolutions per minute, a unit of rotational speed or angular velocity.

Multispeed Fan Motors

Motors designed to operate at various speeds to control the airflow rate for different cooling or ventilation requirements.

Run Winding

The winding of a split-phase motor that remains energized during operation.