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Unformatted text preview: Email: [email protected] 2. What would happen to an action potential under the following conditions: a. Increase the strength of the stimulus b. If a second stimulus was given during the peak of the action potential c. If a second stimulus of the same magnitude was given during the hyperpolarizing period of the action potential 3. Tetrodotoxin (TTX) was isolated from a puffer fish and administered to a neuron. a. What would happen to the action potential when a stimulus is given after administration of TTX? b. If you eat a puffer fish, would you die? Why or why not? 4. An action potential can reach peak amplitudes up to +50 mV. a. Why doesn’t the depolarization stop at 0 mV? b. What ion currents are responsible for depolarization? Repolarization? Hyperpolarization? 5. During which parts of the action potential does V m nearly reach E Na and E K ? Why does it only nearly reach these potentials?...
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This note was uploaded on 03/10/2011 for the course BIPN 100 taught by Professor French during the Winter '07 term at UCSD.
- Winter '07