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Title: Physioex 9.0 Exercise 3 Pre & Post-Lab Activity 4 Post by: ufgatorgirl on Oct 12, 2012 Pre-Lab
An action potential requires _______. An action potential requires _______. sodium to flow with its electrochemical gradient voltage-gated sodium channels to open voltage-gated sodium channels to open and sodium to flow with its electrochemical gradient chemically gated sodium channels to open To reach threshold, the amount of sodium _______. To reach threshold, the amount of sodium _______. entering the cell must overcome the potassium exiting exiting the cell must overcome the potassium entering entering the cell must overcome the potassium entering exiting the cell must overcome the potassium exiting Which of the following blocks voltage-gated sodium channels? Which of the following blocks voltage-gated sodium channels? potassium tetrodotoxin and lidocaine tetrodotoxin lidocaine Which of the following is used to block pain? Which of the following is used to block pain? potassium tetrodotoxin and lidocaine tetrodotoxin lidocaine Post-Lab Which of the following occurred in the presence of tetrodotoxin? Which of the following occurred in the presence of tetrodotoxin? The size of the action potential increased. The size of the action potential decreased. The number of action potentials decreased. The number of action potentials increased. Which of the following occurred in the presence of tetrodotoxin? Which of the following occurred in the presence of tetrodotoxin? An action potential was always seen at R1. An action potential was always seen at R2. An action potential was always seen at R1 and R2. All action potentials were missing. In the presence of lidocaine, the action potential was NOT affected at R1 because _______. In the presence of lidocaine, the action potential was NOT affected at R1 because _______. lidocaine was applied downstream of R1 lidocaine doesn't have an effect on the generation of action potentials lidocaine was applied upstream of R1 there are no voltage-gated sodium channels to be affected The effects of lidocaine and tetrodotoxin were _______. The effects of lidocaine and tetrodotoxin were _______. identical similar, but lidocaine had a greater effect very different, because lidocaine had no effect similar, but tetrodotoxin had a greater effect Title: Re: Physioex 9.0 Exercise 3 Pre & Post-Lab Activity 4 Post by: IlIlidfga on Oct 28, 2012 Answers?
Title: Re: Physioex 9.0 Exercise 3 Pre & Post-Lab Activity 4 Post by: bio_man on Oct 28, 2012 Answers? The thread's author needs to post two questions per thread. That's why the thread was left without a response. |