Explain what happens when the K+ soltn are added to the different environments over the course of time
The ion to which the membrane is permeable will diffuse across the membrane down its concentration gradient until the resulting voltage caused by the separation of charge is just enough to balance the concentration force.
Explain what happens when the K+ soltn are added to the different environments over the course of time
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When K+ solution is added to different environments, the following happens over time:
1. Diffusion: K+ ions will start diffusing across the membrane from the area of high concentration (the K+ solution) to the area of lower concentration (the inside of the cell or the adjacent solution) due to their concentration gradient.
2. Charge Separation: As K+ ions move, they create a separation of charge, with positive charges moving out and negative charges remaining inside. This causes the inside of the cell to become more negatively charged compared to the outside.
3. Equilibrium: Eventually, a point is reached where the electrical force (voltage) created by the charge separation opposes the movement of K+ ions, balancing the concentration gradient. This voltage is known as the equilibrium potential for K+, typically around -90 mV for neurons.
4. Final State: At equilibrium, there’s no net movement of K+ ions across the membrane, despite the presence of a concentration gradient, because the forces of concentration and electrical potential are equal and opposite.
This process demonstrates the principles of diffusion, concentration gradients, and electrochemical equilibrium, which are vital for understanding membrane potential in cells. If you have more questions or need further clarification, feel free to ask!