1. LO 1 How does the opening of a Na+ channel cause a neuron to depolarize? 2. LO 2 What is the difference between temporal and spatial summation? Can spatial summation occur without temporal summation? 3. Which type of neuron would you expect to have more dendrites, an afferent (sensory) neuron or an interneuron? Justify your answer.

1. LO 1 How does the opening of a Na+ channel cause a neuron to depolarize? 2. LO 2 What is the difference between temporal and spatial summation? Can spatial summation occur without temporal summation? 3. Which type of neuron would you expect to have more dendrites, an afferent (sensory) neuron or an interneuron? Justify your answer.

An Illustrated Guide To Vet Med Term

4th Edition

ISBN:9781305465763

Author:ROMICH

Publisher:ROMICH

Chapter13: Nerves Of Steel

Section: Chapter Questions

Problem 8MC

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Place the steps of the action potential in order. 3. a brief reversal of membrane potential that travels along the axon mechanism that restores the resting membrane voltage and intracellular ionic concentrations 2.C reversal of the resting potential due to an influx of sodium ions 1. period during which potassium ions are diffusing out of the neuron because of a change in membrane permeability
7. When the absolute threshold is reached, _______________________ allowing a rapid influx of positively charged sodium ions and changing the membrane potential of the neuron from -70mV to +40mV.
12. An EPSP causes (depolarization/repolarization/hyperpolarization). These occur most often on what part of the neuron?___________________________________; ___________________________________.13, An IPSP causes (depolarization/repolarization/hyperpolarization). These occur most often on what part of the neuron?___________________________________; ___________________________________.14. Where on the neuron does integration occur (approximately)?___________________________________.
#4 help
Identify whether the statement is TRUE or FALSE 1. The tightly packed coil of neurolemmocyte membrane that encircles certain kinds of axons is called a node. 2. Depolarization of the membrane of a nerve cell occurs by the rapid influx of organic ions. 3. In a resting neuron the outside is negatively charged. 4. The interior surface of a membrane of a nonconducting neuron differs from the exterior surface in that the former is negatively charged and contains more sodium.
2.) what of these nerve fiber has action potenital moving toward the central nervous system ? sensory fiber sympathetic nerve fiber parasympatheic nerver fiber motor fiber question 3 : The autonimic nervous system controls involuntary muscle such as the cardiac & smooth muscle true False question 5 It is important to remeber to the neurogila cells are not direclty part of ; A.) forming insulating membrane to cover the axon b. ) anchoring neuron to capilliares or nutrient supply c. ) controlling the neuron enviornment d. ) begin a pathways for the action potential
16. Which option is correct
answer item 4 only.
2.Neurons a.What are the 3 types of chemical channels and where on the neuron would they be found? b.What would happen to the membrane potential of a neuron if a sodium chemical channel opened? Would it change the response of the neuron if a potassium channel opened? Explain. c. What is the ultimate explanation of why the action potential only moves in one direction within the neuron? What is the proximate reason for this? Explain! d. What is the difference between stopping a signal from reaching a post-synaptic neuron, and inhibiting the post synaptic neuron? Explain.
Activity 2 Look at this figure and then answer of the following questions Sensory input Afferent Brain Vbod nouaM yaane nowene Integration Motor output Efferant 1. Which neuron takes the information from the eye to the brain? 2. What is the role of the brain in this process? 3. Which neuron takes the information from the brain to the effector organ. 4. Explain the role of neurons in your life
1. Label the parts of this neuron: 2. Explain the function of each component in #1. 3. Mark the following statements as TRUE or FALSE: An action potential is something that only occurs at synapses. Afferent pathways send sensory information to the CNS for processing. When they are at rest, neurons are more positively charged inside than outside the cell. FALSE Action potentials originate at the axon terminal and move towards the dendrites. An action potential travels down the length of the neuron with the help of voltage-gated calcium channels. Neurons can only have one action potential and must be recycled by glia once they have depolarized. At axon terminals, calcium influx stimulates vesicle release. Ligand-gated ion channels open in response to a molecule binding to them. 4. For each FALSE statement in #3, explain why it is incorrect. Page 1 of 1 https://menlo.schoology.com/assets/bundles/js/pdftron-webviewer/a.&preloadWorker-1&pdfnet3D0&pageHistory=1&useDownloader=0&subzero=1
1. Describe the steps in Synaptic Transmission. Be sure to include how the synapse gets turned "off" afterward. 4