MATH 110 Midterm: Exam 3B Solutions
14 Mar 2019
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Vth (trigeminal), viith (facial), ixth (glossopharyngeal) and xth (vagus) are all mixed nerves. Outer hair cells and the dendrites of type i spiral ganglion cells are the targets of the ocb. Each got you half credit. Some gave us only one answer when the question asked for two. Tberein lies an age- old lesson about reading the question. 1: because the channels you named in a are non- specific cation channels, ca2+ flows through both of them. Show us how you arrived at your answer. Assume we are examining a cochlea at room temperature. Eca differ for the two types of channels. For nicotinic receptors, vm = - 60 mv and eca = 58/2 log 104 = 116 mv; df = - 176 mv. Be sure to make clear to us the conductance for each type of hyperpolarization. Explain how that is possible. Both rm and cm change.
