Ch 11 HW question n answers graded A+ 2023

Ch 11 HWDrag the charges to the correct side of the membrane to represent the resting membrane potential of a typical neuron. - correct answer Use the provided ions to correctly complete each sentence about the resting membrane potential. Ions may be used more than once, or not at all. - correct answer Drag and drop the correct concentrations and the direction of the concentration gradient in a cell at RMP. - correct answer Which choice best characterizes K+ leakage channels? - correct answer transmembrane protein channels that are always open to allow K+ to cross the membrane without the additional input of energy Assume you have a membrane with only potassium leakage channels. The RMP is -90mV. Predict the RMP if we add Na+ leakage channels. The most likely RMP value of Na+ is __________. - correct answer -70mV Imagine that the cell membrane from the previous problem becomes more permeable to Na+. Predict how this will affect the RMP. - correct answer the RMP will be more positive Complete the following sentence. The operation of the Na+−K+ ATPase pump __________. - correct answer moves 3 Na+ to the ECF and 2 K+ to the cytoplasm You are going to record RMP from a cell using an electrode. You place your electrode and record a resting membrane potential every millisecond. You record an initial value of -70mV; however, over time you notice that your recordings become more and more positive until the RMP reaches 0mV. Assuming that Na+ and K+ are the major determinants of RMP in this cell, which of the following could best explain your results? - correct answer the cell's Na+-K+ ATPase pumps have stopped functioning Cl− is a common, negatively charged extracellular ion. Predict the effect on the RMP if many Cl− gated channels are suddenly opened. - correct answer a more negative RMP would result