85 LO85 Identify whether a neuronal network is excited or inhibited based on the individual action of each neuron involvedWhat would be the state of following system?XXIf we remove the first neuron it would be turned onIt is turned onXit is turned offRemoving the first neuron would not have an effect on the outcome+If we remove the first neuron it would be turned offXx + =

Essentially electrical devices, neurons are. The cell membrane, which forms the partition between a…

LO85 Identify whether a neuronal network is excited or inhibited based on the individual action of each neuron involved What would be the state of following system? O X If we remove the first neuron it would be turned on xxxx + = + Removing the first neuron would not have an effect on the outcome It is turned on it is turned off If we remove the first neuron it would be turned off

LO85 Identify whether a neuronal network is excited or inhibited based on the individual action of each neuron involved What would be the state of following system? O X If we remove the first neuron it would be turned on xxxx + = + Removing the first neuron would not have an effect on the outcome It is turned on it is turned off If we remove the first neuron it would be turned off

Anatomy & Physiology

1st Edition

ISBN:9781938168130

Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble

Publisher:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble

Chapter12: The Nervous System And Nervous Tissue

Section: Chapter Questions

Problem 8ILQ: Watch this video (http://openstaxcollege.org/l/neurotrans) to learn about the release of a...

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Watch this video (http://openstaxcollege.org/l/summation) to learn about summation. The process of converting electrical signals to chemical signals and back requires subtle changes that can result in transient increases or decreases in membrane voltage. To cause a lasting change in the target cell, multiple signals are usually added together, or summated. Does spatial summation have to happen all at once, or can the separate signals arrive on the postsynaptic neuron at slightly different times? Explain your answer.
In the propagation of a nerve impulse: a. the refractory period begins as the K+ channel opens, allowing K+ ions to flow outward along their concentrationgradient. b. Na+ ions flow out of the axon with their concentration gradient. c. positive charges lower the membrane potential to its lowestaction potential. d. gated K+ channels open at the same time as the activationgate of Na+ channels closes. e. the depolarizing stimulus lowers the membrane potential toopen the Na+ gates.
Watch this video (http://openstaxcollege.org/l/neurotrans) to learn about the release of a neurotransmitter. The action potential reaches the end of the axon, called the axon terminal, and a chemical signal is released to tell the target cell to do something, either initiate a new action potential, or to suppress that activity. In a very short space, the electrical signal of the action potential is changed into the chemical signal of a neurotransmitter, and then back to electrical changes in the target cell membrane. What is the importance of voltage-gated calcium channels in the release of neurotransmitters?
At a chemical synapse, what happens? O action potentials are propagated more quickly than at an electrical synapse O the postsynaptic neuron converts an electrical signal into a chemical signal O the presynaptic neuron converts an electrical signal into a chemical signal O two cells communicate directly via connections at gap junction O there is a synaptic delay of about 3 seconds as the neurotransmitter crosses the synaptic cleft < Previous
What is the difference between an action potential and a synapse? (select all that apply) The action potential moves down the axon and a synapse is between neurons. The synapse travels long distances and the action potential can only travel short distances. The action potential starts at the dendrites and the synapse starts at the ахon. The action potential is always the same and the synaptic potentials vary. the action potential involves only the postsynaptic neuron, but the synapse involves both the pre- and post-synaptic neurons.
Given that a neuron's action potential moved at a speed of 105 m/sec, would you expect this neuron to be myelinated or non-myelinated? Why? Choose the best answer. O non-myelinated because the absence of myelin tends to allow neurons to transmit signals faster O myelinated because the absence of myelin tends to allow neurons to transmit signals faster O both myelinated and non-myelinated types of neurons are capable of transmitting signals at the rate Next « Previous
A neuron has a resting membrane potential of -70 milivolts (mV) and a threshold value of -55 mV. Three synapses on the body of this neuron receive the impulses listed below. hyperpolarisation by 5 mV • depolarisation by 15 mV • depolarisation by 10 mV ENTER THE MEMBRANE POTENTIAL AS A NUMBER WITH + OR - IN FRONT OF IT. The final membrane potential will be mV and this cause an action potential becasue it is v than the
F Which refers to the time during which a neuron can undergo an action potential? O the resting membrane potential ↑ 11 @ #3 the depolarization period of the neuron polarization period of the neuron Transmission of the nerve impulse across the synapse is accomplished by which of the following? 2@ 3 £ the membrane potential sodium-potassium pump release of a neurotransmitter by a dendrite 1 release of a neurotransmitter by an axon release of a neurotransmitter by the cell body 54 2 $ % 4¢ 5 ¤ V6 31 acer Oll O & 6- 71 8² * 00 69 93 x
Choose all that apply [Na*] + [K'] | + + + + This diagram is a drawing of normal conditions that occur in a neuron's axon (not all details are included). This stage that a living neuron would be in, would show that no positive ions are inside the cell current is traveling down the axon the cell will be at rest once the Na ions enter the cell the cell is at rest Na ions are predominantly outside the cel
Given the steps shown below, which of the following is the correct sequence for transmission at a chemical synapse? 1. neurotransmitter binds with receptor 2. sodium ions rush into neuron's cytoplasm 3. action potential depolarizes the presynaptic membrane 4. ion channel opens to allow particular ion to enter cell 5. synaptic vesicles release neurotransmitter into the synaptic cleft O 1, 2, 3, 4, 5 O 5, 1, 2, 4, 3 O 2, 3, 5, 4, 1 O4, 3, 1, 2, 5 O 3, 2, 5, 1, 4
Channel labels Voltage-gated K* channels Voltage-gated Na+ channels Ligand-gated Na+ channels Voltage-gated K* channels lon movement labels K+ exits cell Na+ enters cell K+ exits cell Na+ enters cell Graded potential Depolarization (EPSP) +30 mV -70 Time (msec) +30 mV -70 Depolarization Action potential Time (msec) +30 mV -70 Repolarization Time (msec) +30 mV Hyperpolarization Overshoot -70 Time (msec)
You have bunch of neurons in alive in a dish. You are recording from the axon hillock of one neuron while you stimulate an action potential in another neuron that synapses on the neuron you are recording from. One action potential from your presynaptic neuron causes +5 mV depolarization in the postsynaptic neuron’s axon hillock. Threshold for this neuron requires +10 mV. How can you most assuredly achieve threshold for this post-synaptic neuron? Group of answer choices Firing the presynaptic neuron multiple times in close succession Firing the presynaptic neuron plus another random presynaptic neuron that you find in the dish You can’t a +5mV EPSP will never be able to reach a 10mV threshold Firing the presynaptic neuron multiple times but keep the firing events spaced out really far in time.