A Nerve Cell Fires with a Frequency of 50 Hz

question 43

Multiple Choice

A nerve cell fires with a frequency of 50 Hz. With each firing, 10⁵ singly charged potassium ions are ejected through the cell's membrane, across which exists a potential of 90 mV. At what rate must energy be supplied to the nerve cell in order for it to fire?

• A)7 × 10^-15 W
• B)3 × 10^-14 W
• C)8 × 10^-14 W
• D)9 × 10^-13 W

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