BIPN 100 Chris Childers Dr. Fortes Winter 2010 Test Questions: 1. Fill in the following… [Ion]inside (mM) [Ion]outside [mM) Eion: (mV) Driving Force Vm = -70mV Driving Force Vm = +30mV Direction Vm = -70mV Direction: Vm = +30mV K = 150 K = 1.5-122 +52 +152 Out Out Na = 14 Na = 140 +61-131-31 In In Cl = 100 Cl = 10 +61-131-31 Out Out Ca = 0.0001 Ca = 1 +122-192-92 In In 2. In the year 2056, Mars has a research lab in the MIH (Martian Institutes of Health). Drs. Little & Greenman discover life in an underground lake and study neurons from a new life form. They find the following ionic compositions: [Li+]in = 8.5mM, [Li+]out = 850mM, [Rb+] in = 770 mM, [Rb+]out = 7.7mM, [I-]in = 700mM, [I-]out = 70mM. They measure the resting membrane potential at 37o to be +61mV… A. Which ion has the highest permeability(conductance) at rest? Li+ or I-B. Which ion(s) is/are actively transported and in what direction? Li+ out of the cell and Rb+ into cell When they stimulate the neuron they see strange action potentials in the axons. The membrane potential changes
This is the end of the preview. Sign up
access the rest of the document.
This note was uploaded on 01/31/2010 for the course BILD BIPN 100 taught by Professor French during the Winter '08 term at UCSD.