Investigation Question: How does stimulating the neuron send a signal to the brain? 3. What do you predict the answers to the Investigation Question will be? Explain. Hint: Use the PhET simulation to help make your hypothesis. Step 4: Testing your Hypothesis Return to the simulation and click the yellow "stimulate neuron" button. 4. Record what happens to the ions AND the channels. How is this activity different than in steps 1-3? Be sure to note which kinds of channels are working. Investigation Question: How does stimulating the neuron send a signal to the brain? 3. What do you predict the answers to the Investigation Question will be? Explain. Hint: Use the PhET simulation to help make your hypothesis. Step 4: Testing your Hypothesis Return to the simulation and click the yellow "stimulate neuron" button. 4. Record what happens to the ions AND the channels. How is this activity different than in steps 1-3? Be sure to note which kinds of channels are working.

Investigation Question: How does stimulating the neuron send a signal to the brain? 3. What do you predict the answers to the Investigation Question will be? Explain. Hint: Use the PhET simulation to help make your hypothesis. Step 4: Testing your Hypothesis Return to the simulation and click the yellow "stimulate neuron" button. 4. Record what happens to the ions AND the channels. How is this activity different than in steps 1-3? Be sure to note which kinds of channels are working. Investigation Question: How does stimulating the neuron send a signal to the brain? 3. What do you predict the answers to the Investigation Question will be? Explain. Hint: Use the PhET simulation to help make your hypothesis. Step 4: Testing your Hypothesis Return to the simulation and click the yellow "stimulate neuron" button. 4. Record what happens to the ions AND the channels. How is this activity different than in steps 1-3? Be sure to note which kinds of channels are working.

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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5 A Which of the following choices correctly fills in the blanks? After repolarization, the sodium ions are found neuron. This reversal of ions can be fixed by the action of E potassium ions are brought in. Select one: outside b. A A inside Oc Od. A outside A inside В inside B outside B inside B outside voltage gated channels two C D C D C D Na/K* exchange pump two Na/K* exchange pump three two the neuron and the potassium ions are found B of the D sodium ions are taken out and D E three E E three E voltage gated channels three two
are recording from tvWo heuro erize the synapse tn connects vnen he presynaptic neuron (Neuron A) fires an action potential, the postsynaptic neuron (Neuron B) is apidly depolarized. You suspect that the synapse is electrical, and carry out the following experiments to test your hypothesis. 3. To further test your conclusion from Question 1A, you inject the dye Lucifer Yellow (a very small luorescent molecule) into the Neuron A. Would you expect this dye to appear in the Neuron B? Why or why not?
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Inhibitory post synaptic membrane potential - Data Cl- Cl- Nr of GABA inside Max Postsynaptic Voltage (mV) outside receptors 140 20 hel-89- 00 140 20 - 34.428 140 40 - ףQLL-b Questions 11. What is an IPSP? 12. GABA receptors on the postsynaptic neuron function as ion channels for which ion? 13. Based on the data collected, when is it more possible for an action potential to occur? When the intracellular Cl- concentration in the postsynaptic neuron increases or when the number of GABA receptors on the postsynaptic membrane increases? 14. Explain
voltmeter microelectrode electrode Giant squid axon A voltmeter was used to measure the potential difference across the cell membrane of a giant squid axon. Which of the following best explains the voltmeter reading? Select one: a. The threshold potential has not been reached. b. The sodium potassium exchange pumps are working to take out the sodium ions and bring in the potassium ions. c. The potassium ions have rushed out of the axon, and the potassium channels are slow to shut down. d. The sodium ions have rushed into the axon, and the sodium channels are closing.
Intro to neuroscience
Remaining Time: 1 hour, 16 minutes, 05 seconds. Qu B BIUS Paragraph V Arial P 田心田 V 10pt X2 X2 # A = K7 ヒン V V V A V V T +] ABC V r T " Π 99 Ω € + QUESTION 27 What is the correct time-span for each stage in the "information processing model"? For each of the stages (sensory, short-term, and long- term), choose letter A, B, or C. Sensory Long-term memory Short-term (or working) memory A. Days to Years B. 1-2 seconds C. 30 seconds to several minutes QUESTION 28 Which one below does not describe the meaning of "episodic memory? This refers to remembering events and experiences at specific times and places. This refers to remembering the sequence of events and when things happened.
Patch clamp recording of a single ion channel yields the following results: Holding Potential (mV) Measured Current (pA) -100 -1.0 -50 0.0 0 +1.0 +50 +2.0 +100 +3.0 part a.) Calculate the membrane potential at the instant when a neuron has the following relative permeabilities: PK+ = 1.0, PNa+ = 1.0, PCl- = 1.0. Use the ionic concentration values in the picture included. a.) -12 mv b.) -35mv c.) -60 mv d.) +20 mv e.) 0 mv part b.) What would be the equilibrium potential for K+ in neurons under such circumstances? a.) -11 mv b.) +30 mv c.) +75 mv d.) -35 mv e.) 0 mv part c.) What would be the new resting potential, discounting the effects of non-gated chloride channels (just give an approximate value – no calculation is necessary)? a.) about +20 to +25 mV b.) about -30 to -40 mV c.) about +1 to +5 mV d.) close to ENa+ e.) about -10 to -15 mV
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Action Potential of Neurons Worksheet 1. Explain how an action potential and graded potential are different. Where do they occur on a neuron? How long does each last? What kind of gates is each process using? 2. Describe the following in your own words a. resting potential C. hyperpolarization e. threshold 9. 3. What triggers an action potential? What happens to the membrane to trigger an action potential? 4. What is a positive feedback loop? How does a neuron create a positive feedback loop (self- propagation) 5. What is the role of the voltage-gated sodium channels for producing an action potential? 6. What is the role of the voltage-gated potassium channels? 7. What would happen if the voltage gated sodium channels a. Never opened? b. Stayed open longer than normal? 8. What is the absolute refractory period? What is the relative refractory period? Consider the following three diagrams of a nerve cell membrane. They show resting potential, depolarization, and hyperpolarization.…