BRAIN
CEREBELLUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A friend has taken a job in a neuroscience research lab, and is studying neurons in a freshwater snail. He has been told to calculate the equilibrium potential of K+. Which equation will he use and what other information will he need?
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Nernst equation; concentration of K+ inside and outside of the cell
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Nernst equation; concentration of K+ inside and outside of the cell and permeability of K+
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Goldman equation; concentration of K+ inside and outside of the cell
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Goldman equation; concentration of K+ inside and outside of the cell and permeability of K+
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Nernst equation; concentration of K+, Na+, and Cl-inside and outside of the cell
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Explanation:
Detailed explanation-1: -Moreover, K+ is a positively charged ion that has an intracellular concentration of 120 mM, an extracellular concentration of 4 mM, and an equilibrium potential of-90 mV; this means that K+ will be in electrochemical equilibrium when the cell is 90 mV lower than the extracellular environment.
Detailed explanation-2: -The larger the concentration gradient, the larger is the equilibrium potential. The equilibrium potential for any ion can be calculated using the so called Nernst equation.
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