1.)Why did you fill the extracellular solution with Ca2+?
2.)Explain why you saw a greater amount of neurotransmitter release with the high intensity stimulus compared to the lower intensity stimulus. Video 2:Chemical Synapses
Part 2 https://iad.cdn.nv.instructuremedia.com/originals/… Questions for this Video:
1.)After you removed the Ca2+ from the ECF and sent the action potential explain why there was no release of neurotransmitters after the action potential was created.
2.)How is the amount of neurotransmitters released affected (influenced) but the frequency of action potentials (nerve impulses)?
3.)Why does decreased the calcium change the amount of neurotransmitter released?
4.)Why does adding magnesium to the ECF affect the release of neurotransmitter? Video 3:Resting Membrane Potential Part 1: https://iad.cdn.nv.instructuremedia.com/originals/… Questions for this Video: 1.)After increasing the extracellular concentration of K+ (note that you did not really change anything concerning Na+) explain why the membrane potential decreased (became more positive). HINT: Think of your answer in terms of how the gradient(s) for K+ changed. Video 4:Resting Membrane Potential Part 2 https://iad.cdn.nv.instructuremedia.com/originals/… Questions for this Video: 1.)After decreasing the extracellular concentration of Na+ explain why the membrane potential increased (became more negative) 2.)Why did altering the extracellular sodium have less of an effect than changing the extracellular potassium? Video 5: The Action Potential: https://iad.cdn.nv.instructuremedia.com/originals/… Questions for this Video: 1.)Why did the sensory neuron not release neurotransmitters after you applied the “very weak” stimulus? 2.)When you applied the “moderate” stimulus to the sensory neuron why the the membrane potential in the sensory neuron decrease (become more positive) compared to when you applied the “very weak” stimulus? 3.)When using the moderate stimulus on the sensory neuron explain whey the interneuron was able to create and action potential (think in terms of a progression of activities). 4.)Explain why the strong stimulus on the sensory neuron led to more action potentials in the interneuron. Requirements: Answer the following question for each video ‘
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