Why Do Na⁺ Ions Enter the Cell When Voltage-Gated Na⁺

question 28

Multiple Choice

Why do Na⁺ ions enter the cell when voltage-gated Na⁺ channels are opened in neurons?

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

Understand the principles and truths underlying natural selection.

Understand the concept of natural selection and its effects on species adaptation and evolution.

Recognize the relationship between genetic mutations and the development of new traits that can enhance survival.

Identify various periods of increased extinction rates and their implications on biodiversity.

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