Exam+2+--+Fall+2005+--+ANSWERS+_do+not+distribute_

Exam+2+--+Fall+2005+--+ANSWERS+_do+not+distribute_ - B...

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Biology 225: Animal Phys Exam 2 Exam lnstructions: Name: Anne A Student Student lD: 1234 5678 Please make sure that your name and student lD number go on every page of the exam, including the Scantron form! Your exam may be separated for grading, and if your name isn't on a page, it will cost you 2 points per page! This exam has 2 parts. The first is short essay. The questions generally require only two to four sentences to answer. These questions are worth 50 points out of 100, so you should spend approximately half of your time answering them. The second part is multiple choice, which are to be answered on the Scantron forms. There is a single answer to be bubbled in for each question in this part. Again, make sure that your Scantron forms have your name and lD on them! These questions are worth 50 points out of 100, so you should spend approximately half of your time answering them. Part 1: Essay questions (50 pts): Right now you are all probably feeling a bit of "fight-or-flight" about this exam. Hopefully all of you want to conquer the exam, though some might prefer to just run away. List three effects each that the parasympathetic and sympathetic parts of the autonomic nervous system have, and briefly explain why we have both the sympathetic and parasympathetic systems (1 2 points). Sympathetic Parasympathetic 1. lncreased heart rate 1. Decreased heart rate 2. Dilation of airways 2. Constriction of airways 3. Decreased digestion 3. Increased digestion Or any items from Table 5-4 from the textbook. (1 point each for a total of 6
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You are now a world-famous neurobiologist working on anesthetics. You are recording from a neuron (shown below) at two points. lf you stimulate cell A, then cell B will fire an action potential. Draw what potentials you would record from the cell at the two points below from stimulating cell A. You are next testing Lidocaine, a local anesthetic that locks voltage-gated Na' channels in the inactive state. You apply Lidocaine to the neuron you are recording from (assume no effect on neuron A), and then stimulate neuron A twice with a good bit of time between the two stimuli. Draw the potentials you would record from Electrode 1 and 2 (13 pts). Electrode 2 Electrode 1 1 pt for electrode 1 being a graded potential 1 pt for electrode 1 at or above threshold 1 pt for electrode 2 being an action potential 1 pt for electrode 2 having appropriate hyperpolarization 4 points total Threshold Stimulate cellA: Biology 225: Animal Phys Exam 2 Name: Anne A Student Student lD:_1234 5678
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This note was uploaded on 07/11/2011 for the course BIOLOGY 225 taught by Professor Pavgi during the Spring '10 term at University of Michigan.

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Exam+2+--+Fall+2005+--+ANSWERS+_do+not+distribute_ - B...

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