NURS 5315 Advanced Patho Exam 1 Questions and answers

NURS 5315 Advanced Patho Exam 1 Questions and answers Steps of the Action Potential - Answer-Depolarization Repolarization Hyperpolarization Depolarization - Answer-movement of the intracellular charge towards zero (more positive charge) Voltage gated Na channels open and allow Na to enter the cell -> voltage inside the cell moves towards zero Repolarization - Answer-Once the intracellular charge reaches zero, the negative polarity of the inside of the cell is restored back to its baseline of -70 to -85 mV -Na channels close, K channels open Hyperpolarization - Answer-when the cell's resting membrane potential is greater than -85mV. Is less excitable, because there is a greater distance between the resting membrane potential and the threshold potential. In order for the action potential to be sucessful - Answer-t has to depolarize by 15-20 mV (threshold potential) to reach -55 to -65 mV. An alteration in action potential may result from - Answer-neurologic diseases, muscle disease or electrolyte imbalances. What is the main protein responsible for maintaining the correct balance of