practice test

practice test - Sample exam I NPB 100, Summer 2009 Question...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Sample exam I – NPB 100, Summer 2009 Page: 1 Question 1. At which point(s) in this action potential is the cell’s membrane more permeable to potassium than it is to sodium? CIRCLE AS MANY ANSWERS AS ARE CORRECT! A B C D Question 2. Ouabain is a toxin that prevents the Na + /K + ATPase from working. 2a. You apply ouabain to a cell with a resting membrane potential of –60 mV, and you wait several hours. This will have which effect on the cell’s membrane potential? CIRCLE ONE ANSWER: depolarize hyperpolarize no effect 2b. (4 points) Explain your answer to question 2a. Question 3. You are studying a cell with no chloride transporters or exchangers. The resting membrane potential of this cell is -65 mV. Remember that log 0.01= -2, log(0.1) = -1, log(1) = 0, log(10) = 1, log(100) =2, log(1000)=3 3a. What is the equilibrium potential for chloride? Explain your answer. 3b. Will opening chloride channels in this cell cause depolarization or hyperpolarization?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Sample exam I – NPB 100, Summer 2009 Page:
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/01/2009 for the course NPB 100 taught by Professor Chapman during the Summer '08 term at UC Davis.

Page1 / 6

practice test - Sample exam I NPB 100, Summer 2009 Question...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online