Review Sheet Results Essay

1. beg off why increasing extracellular K+ reduces the net diffusion of K+ discover of the neuron through the K+ discover channels. Your answer Because out-of-door a regular cell, the ingress of K+ is about 5mM and the submerging of Na+ is about 150 mM. When you extend the denseness of K+ from 5 to 25 mM and reduce concentration of Na+ from 150 to 130 mM, the outside has to a greater extent concentration of K+. The tissue layer is semipermeable to a particular ion, that ion testament propagate down its concentration slope from a region of higher concentration to a region of lower concentration. 2. relieve why increasing extracellular K+ causes the tissue layer potence to change to a slight negative value. How well did the results compare with your prognostic? Your answerBecause outside has more K+, the rate of diffusion is less. The resting tissue layer potential drop will become less negative. 3. Explain why a change in extracellular Na+ did not significantly alter the membrane potential in the resting neuron? Your answer Because it did not pitch the resting membrane potential.4. question the relative permeableness of the membrane to Na+ and K+ in a resting neuron. Your answer The resting membrane potential is really a potential difference of opinion between the wrong of the cell (intracellular) and the outside of the cell (extracellular) crossways the resting permeability of the membrane to ions and on the intracellular and extracellular concentraions of those ions to which the membrane is permeable. Na+ and K+ are the close important ions, and the concentrations of these ions are established by transport protein, such as the Na+ -K+ pump, so that the intracellular Na+ concentration is low and the intracellular K+ concentraion is high. The ions will diffuse down its concentration gradient from a region of higher concentration to a region of lower concentration. 5. Discuss how a change in Na+ or K+ conductance would affect the resting m embrane potential. Your answerThe resting period potential is a potential difference between the inside of the cell and the outside of the cell across the membrane. It depends on the resting permeability of the membrane to ions and on the intracellular and extracellular concentrations of those ions to which the membrane is permeable. glance as multi-pages