Action Potential Web Quest：動作電位的Web Quest

1、.Action Potential Web QuestPart 1 NeuronsGo to Read the text and answer the following questions.1. What is a neuron? _2. Draw a neuron below and label the parts in the box below.Part 2 The Sodium/Potassium PumpGo to:View the animation1. How many positive sodium ions are being pumped out? _2. How man

2、y positive potassium ions are being pumped in? _3. Since the numbers are different could this cause an imbalance of charge on either side of the membrane? _4. What molecule is providing the energy for this ion transport? _5. What is the process called when particles are being transported against the

3、 concentration gradient across a membrane? _.Part 3 The Nerve impulse & SynapseGo to http:/www.bris.ac.uk/synaptic/public/basics_ch1_2.html1. Neurons maintain different concentrations of certain ions across their cell membranes. What ion is in high concentration outside the neuron? _2. Which ion

4、 is in high concentration inside the neuron? _3. What specialized protein exists in the neural cell membrane? _4. What is its function? _5. Under resting conditions which ion leaks more, the sodium leaking inward or the potassium leaking outward? _6. The result of the leaks makes the outside of the

5、cell charged _ and the inside of the cell charged _. The cell is said to be _.7. Since sodium is in high concentration outside of the cell what happens if the sodium channel opens in the membrane? Which way does the sodium move? _.8. This makes the neuron momentarily _ charged. The cell is said to b

6、e _.9. This switch in membrane potential is the _.10. View the animation to see how the action potential moves down the length of the cell (in one direction). Summarize whats happening._11. What is the speed of an action potential directly related to? _12. What type of axon results in fast transmiss

7、ion rates? _13. What substance allows for rapid action potential? _14. What produces myelin in the PNS? _ CNS? _15. Where does an action potential take place on a myelinated neuron? _16. Why does an action potential happen faster on a myelinated neuron than an unmelinated neuron? _ _ _17. What does

8、the disease Multiple Sclerosis have to do with all this?_Go to View this animation. It shows the action potential moving in one direction along the neurons axon.1. What is happening to the charge on the outside and inside of the cell as the action potential moves? _.Go To Website http:/psych.hanover

9、.edu/Krantz/neurotut.htmlClick on > Review of Physical Factors involved in the Action Potential.Read Diffusion 1. Give the definition of diffusion._ > Click on Figure 1 Diagram.2. What is the ultimate goal of diffusion? _> Click on Right Arrow - Diffusion and the Axon 3. Is the inside of th

10、e axon more positive or negative during the resting potential? _4. What do the colored bars represent? _Colored circles? _5. During the resting phase the concentration of _ is greater outside and the concentration of _ is greater inside.> Click on the ion channels and observe Figure 3a> Click

11、on Left arrow6. Answer Question 1. _Click on > Right Arrow - Electrical Charge and Attraction7. Define Ion. _8. Opposite charges do what to each other? _>Click on Right Arrow9. Like charges do what to each other?_Click on > Right Arrow - Voltage and the Axon10. During the resting potential

12、the axon has a _ to _ voltage comparing the inside to the outside.11. So what effect will the voltage difference have on the Na+ ions when the Na+ channels first open? _ (write and click on the correct answer)Click on > Back Button then Click on > Right Arrow - Depolarization12. Describe the a

13、xon at the end of the depolarization phase. _13. At the end of the depolarization phase, what is the tendency for movement of a sodium ion at the mouth of a sodium channel? _Click on > Right Arrow - Repolarization14. Describe the events of repolarization. _ _Click on > Right Arrow The Action P

14、otential15. Give a brief summary of the overall occurring events involved in the Action Potential. _ _*Take the short QUIZ by clicking on Quiz in the left margin. *Name_Date_Period_A.T. LABGo to Website: /chudler/introb.html#tnØ Click on Neuron Ø Click on Neurot

15、ransmitters and Neuroactive PeptidesClick on the word “Synapse” 1. What is the function of the dendrites? _2. What is the function of the axon? _3. What is the synapse? _4. What three things does a synapse consist of? 1. _2. _3. _Read Electrical Trigger5. Give a brief description of what happens. _

16、_ _ _ _ _6. Can a neuron produce and release more than one type of neuron? _Read Diffusion of Neurotransmitters across a Synaptic Cleft.7. Give a brief description of what happens. _ _ _ _ _ _ _ 8. What can change the properties of neurotransmitter release? _9. What are neurotoxins? _10. Give 3 exam

17、ples and the effect of them. 1. _2. _3. _11. In 2009 how old did the word “synapse” turn? _Go back to Neurotransmitters and Neuroactive Peptide page (the original page you started on)Read Discovery12. Who discovered the first neurotransmitter? _13. What animal did he use in his experiments? _14. Wha

18、t is the name of the neurotransmitter that was discovered? _Read Neurotransmitter Criteria and give a brief description of the six criteria.1. _2. _3. _4. _5. _6. _Read Types and Synthesis and list the six different small molecule neurotransmitters.1. _2. _3. _4. _5. _6. _Read Transport and Release of Neurotransmitters15. Where are the neurotransmitters made?_16. Once a neurotransmitter is made where does it go within the neuron? _17. What is the function of the vesicles? _18. Can neurotransmitters bond to