* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Impulse Conduction Practice Questions
Multielectrode array wikipedia , lookup
Development of the nervous system wikipedia , lookup
Caridoid escape reaction wikipedia , lookup
Optogenetics wikipedia , lookup
Clinical neurochemistry wikipedia , lookup
Mirror neuron wikipedia , lookup
Neural coding wikipedia , lookup
SNARE (protein) wikipedia , lookup
Node of Ranvier wikipedia , lookup
Premovement neuronal activity wikipedia , lookup
Feature detection (nervous system) wikipedia , lookup
Synaptogenesis wikipedia , lookup
Patch clamp wikipedia , lookup
Channelrhodopsin wikipedia , lookup
Nonsynaptic plasticity wikipedia , lookup
Neuromuscular junction wikipedia , lookup
Action potential wikipedia , lookup
Neuropsychopharmacology wikipedia , lookup
Neurotransmitter wikipedia , lookup
Membrane potential wikipedia , lookup
Single-unit recording wikipedia , lookup
Molecular neuroscience wikipedia , lookup
Electrophysiology wikipedia , lookup
Synaptic gating wikipedia , lookup
Biological neuron model wikipedia , lookup
Resting potential wikipedia , lookup
Nervous system network models wikipedia , lookup
Stimulus (physiology) wikipedia , lookup
Name: __________________ Date: ________________ Neurons & Impulse Conduction Questions 1. What is the charge or difference in electrical potential for a “polarized membrane” and how do ion concentrations work to make it that way? (2 marks) 2. Why does the polarity of a cell membrane reverse during an action potential? (2 marks) 3. Why do nerve impulses move faster along myelinated neurons? (2 marks) 4. Use the following diagram to answer parts (a) and (b). Changes in Membrane Potential +40 Membrane Potential (mV) +20 0 -20 B C -40 -60 A Time (ms) a. Which area of the graph indicates the diffusion of Na+ ions into the neurons? Explain your answer. (2 marks) b. Repolarization is occuring in which area? Explain your answer. (2 marks) 5. Explain the difference between depolarization of a neuron and an action potential. (2 marks) 6. Some people report they have a high pain tolerance. Explain how this could be due to threshold levels. (2 marks) 7. Describe the “all-or-none” response. (2 marks) 8. List in a numbered form the events involved in impulse transmission from the presynaptic neuron to the postsynaptic neuron. (4 marks) 9. Describe what is meant by “excitatory” and “inhibitory” when referring to the effects of neurotransmitters on the postsynaptic membrane. (2 marks) 10. What is the relationship between acetylcholine and cholinesterase? (1 mark)