85 LO85 Identify whether a neuronal network is excited or inhibited based on the individual action of each neuron involved(+) x (+) x (-) x (+) x (-) x (-) =If an excitatory neuron were added to the end, the network would be offO turned onturned offRIf an inhibitory neuron were added at the end the network would be on

By considering the special highlights of neurons that make them either energized or calm, and how…

LO85 Identify whether a neuronal network is excited or inhibited based on the individual action of each neuron involved (+) x (+) × (-) x (+) × (-) × (-) = If an excitatory neuron were added to the end, the network would be off Oturned on Oturned off If an inhibitory neuron were added at the end the network would be on

LO85 Identify whether a neuronal network is excited or inhibited based on the individual action of each neuron involved (+) x (+) × (-) x (+) × (-) × (-) = If an excitatory neuron were added to the end, the network would be off Oturned on Oturned off If an inhibitory neuron were added at the end the network would be on

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter4: Principles Of Neural And Hormonal Communication

Section: Chapter Questions

Problem 2SQE

See similar textbooks

Similar questions

View the University of Michigan Webscope (http://openstaxcollege.org/l/nervefiber) to see an electron micrograph of a cross-section of a myelinated nerve fiber. The axon contains microtubules and neurofilaments, bounded by a plasma membrane known as the axolemma. Outside the plasma membrane of the axon is the myelin sheath, which is composed of the tightly wrapped plasma membrane of a Schwann cell. What aspects of the cells in this image react with the stain that makes them the deep, dark, black color, such as the multiple layers that are the myelin sheath?
Which of the following is probably going to propagate an action potential fastest? a thin, unmyelinated axon a thin, myelinated axon a thick, unmyelinated axon a thick, myelinated axon
Which of the following does not contribute to propagation of action potentials? a. As the area outside the membrane becomes negative, itattracts ions from adjacent regions; as the inside of the membrane becomes positive, it attracts negative ions from nearby in the cytoplasm. These events depolarize nearby regions of the axon membrane. b. The refractory period allows the impulse to travel in only one direction. c. Each segment of the axon prevents the adjacent segments from firing. d. The magnitude of the action potential stays the same as it travels down the axon. e. Up to a limit, increasing the intensity of the stimulus increases the number of action potentials.
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
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.
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)
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
Short FRQ The figure below illustrates a generic model of neurotransmitter secretion and reception across a synapse. receptor axon- vesicle presynaptic neuron B synaptic space Respond in complete sentences. postsynaptic neuron A model of chemical signaling across a synapse. (b) Explain the direction of the nerve impulse. nerve impulse (a) Describe the structure of the neuron synapse using proper vocabulary. transporter -neuro transmitter -dendrite
Consider the neuron below, which has a membrane resting potential of -70mV, membrane space constant of Imm, membrane time constant of 100ms, and spike firing threshold of -65mV. The neuron receives input from three synapses. Synapse A generates an EPSP of 12mV amplitude and 2ms duration, synapse B generates an EPSP of 8mV amplitude and Ims duration, and synapse C generates an IPSP with an amplitude of -2mV and duration of 3ms. A axon hillock 0.5mm Justify your answers to the following questions mathematically (round distances to nearest 0.5mm). You can neglect propagation time (ie. assume EPSPS/IPSPS arrive at axon hillock at same time irrespective of distance). (a) Would the cell fire an action potential if A is active? (b) Would the cell fire an action potential if A and B are active simultaneously? (c) Would the cell fire an action potential if B is activated twice with a delay of 2ms? (d) Would the cell fire an action potential if all three are simultaneously active? (e) If an…
Match the events listed with their order in the mechanisms behind the firing of an action potential under normal conditions (without tetrodotoxin present in the man's body). The cell has a resting membrane potential of -65 mV. You should match these events at the initial segment of a bipolar neuron. Please note that this is a sequence question. Although not an option below, you should consider that neurotransmitters are bound to ligand-gated receptors causing EPSPs. Now, put the process in the correct sequence: **arrange from 1-10
Compound X has been shown to block voltage-gated K+ channels with an IC50 of 0.1 mM. Which of the following is the most likely to occur in neurones following application of 0.03 mM X? Action potentials would be prolonged and the resting potential would be depolarised. Action potentials would be prolonged but the resting potential would remain the same. Neither resting potential nor action potentials would be affected because the concentration of X is less than the IC50 value. The resting membrane potential would depolarise but there would be no effect on action potentials.
The options for all 8 are either: Depolarization, Na+ influx into cell Vm=-70mV inactivation of voltage-gated Na+ channels and opening of voltage-gated K+ channels Vm = -55mV, voltage Gated Na+ channels open graded potentials stimulating depolarization at the axon hillock hyperpolarization Repolarization, K+ efflux out of cell cells return to resting membrane potential