Different Concentrations of Ions on Either Side of a Cell $\rarr$

question 54

Short Answer

Different concentrations of ions on either side of a cell membrane constitute a concentration cell, which is described by the Nernst equation given below. What is the electrochemical potential across a membrane when the sodium ion concentration is 0.10 M on one side of the membrane and 0.010 M on the other side, and the temperature is 37°C (body temperature)?
(Given: Na⁺ + e^- $\rarr$ , $E _ { \mathrm { red } } ^ { 0 }$
= -2.71 V; F = 96,485 C; 1 J = 1 C V; R = 8.315 J / (mol K)) $E = E ^ { \circ } - \frac { R T } { n F } \ln Q$

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Definitions:

Proximity

The state, quality, or fact of being close or near; physical closeness.

Gestalt Principle

A theory in psychology suggesting that people tend to organize visual elements into groups or unified wholes when certain principles are applied.

Proximity

The physical closeness or distance between objects or people, which can influence various psychological processes including attraction and the formation of relationships.

Figure-Ground

A principle in gestalt psychology and visual perception, referring to how the eye differentiates an object (the figure) from its surrounding area (the ground).