Neurobiology Problem Set: Understanding Neurons, Ion Channels, and Membrane Potentials, Assignments of Biology

Download Neurobiology Problem Set: Understanding Neurons, Ion Channels, and Membrane Potentials and more Assignments Biology in PDF only on Docsity! 1/2 PROBLEM SET 1 BIPN 140 Lecture 1 & 2 Describe the theories of Golgi and Ramon y Cajal and the contradictions. Who ended up being correct? Draw a neuron and label the main parts. What is meant by functional polarity? How is this involved in signaling? What are glia? Name the types of glia and their main functions as well as whether they are present in the central or peripheral nervous system. Explain convergence and divergence with respect to neurons. Define en passant boutons? A human brain measures about 10 cm in diameter. How much is this in meters, millimeters, micrometers, and nanometers? Give an example of things you learnt in class about which are on the order of centimeters, micrometers, and nanometers. What are the two main requirements for the occurrence of an electrical potential difference across a membrane? What are the two opposing forces which establish an equilibrium potential Calculate the equilibrium potential EK at room temperature for an intracellular concentration of 200mM and an extracellular concentration of 5mM. Draw an I-V plot for two different ionic conductances under conditions where conductance G is the same (0.001 Siemens) but equilibrium potentials (-70 mV and -50 mV respectively) are different. Label the axes. Draw an I-V plot for two different ionic conductances with identical equilibrium potential of -20 mV but different conductance G (0.001 Siemens and 0.002 Siemens, respectively). Label the axes. Calculate Vm given that EK = -90 mV, ENa = 61 mV, gNa = 1, gK = 4. Recalculate Vm for a thirty-fold increase of gNa.