Q: IPSP could result from :-a- opening of K + channelsb- opening of ligand-gated cation channelsc-…
A: The postsynaptic membrane is the membrane, which receives a signal from the presynaptic cell and…
Q: Where in a myelinated axon are nearly all of the ion channels concentrated? options: the cell…
A: In myelinated axons we see myelin layer on the surface of axon. So, we don't see ionic channels…
Q: If we started an orthodromic action potential at the axon hillock and an antidromic action potential…
A: * Two types of directions can be seen in the electrical stimulus. Orthodromic direction: when an…
Q: What event triggers an action potential?a. Opening of sodium channelsb. Opening of delayed potassium…
A: 1- Opening of delayed potassium channels 3-High concentration of negative ions outside the cell.…
Q: "After an action potential has just passed through the axon hillock, the voltage-gated Na+ channels…
A: Thank you for the question Answer : If a second action potential can be generated it refers to as…
Q: Which of the following is the most direct result of depolarizingthe presynaptic membrane of an axon…
A: Neurotransmitters refer to the endogenous chemicals, which enable neurotransmission. These are the…
Q: Repolarization of an axon during an action potential is produced by a. inward diffusion of Na+. b.…
A: A stage of action potential in which the cell undergoes a decrease in voltage, is known as…
Q: When ionotropic receptors allow the influx of ions, the postsynaptic cell depolarizes. When they…
A: The neurons are the cells of nervous system that has the conducting capability. The nerve impulse…
Q: Which of these correctly describes the distribution of ions on eitherside of an axon when it is not…
A: The nervous system composed of the nerves and glial cells that help in transmitting signals between…
Q: In order for an action potential to be triggered, enough stimulus have to collect at the of the…
A: In order for an action potential to be triggered, enough stimulus has to collect at the axolemma of…
Q: Which of the following would increase the speed of a nerve impulse along an axon?A. Decreasing the…
A: The Speed of conduction of nerve impulses is increase by the presence of a myelin sheath . The…
Q: ne: hey insulate portsi of the neuron axon but not the cell body and dendrites. ney increase the…
A: Myelin sheath is the covering around the nerve cells. It is very important as various diseases may…
Q: They first measure the resting potential of the axon. How would you expect the new resting potential…
A: the new resting potential in compare to the normal resting potential of the axon results :
Q: For a neuron to fire an action potential, its membranemust reach ________.a. hyperpolarizationb. the…
A: An action potential is a rapid rise and subsequent fall in voltage or membrane potential across a…
Q: During the Refractory period of the action potential, the neuron will: Select one: O a. Not respond…
A: Nerve cells or neurons are excitable cells of nervous system. A typical neuron consists of cell body…
Q: Calcium ions a)Help control the membrane threshold voltage. b)Reduce axon permeability to Na+.…
A: sensory input-afferent information travels from the outside environment to brain environment.
Q: Refers to the temporary time in which a neuron cannot be stimulated resting potential O refractory…
A: refractory period.
Q: True or False a. When they are at rest, neurons are more positively charged inside than outside the…
A:
Q: A neurotoxin was delivered to a patient that prevented sodium channels from opening at the axon…
A: Action potential is just rise and fall of membrane potential which generates signals to various…
Q: Suppose you stimulate an axon so that you generate an actionpotential at both ends at the same…
A: “Since you have posted a question with multiple sub-parts, we will solve first three sub parts for…
Q: The two primary factors that influence the speed of an action potential propagation are axon…
A: The nervous system is an exceptionally complex piece of a creature that arranges its activities and…
Q: Ordinarily, a neuron’s trigger zone is activated before any other part ofan axon, so a wave of…
A: Nerve cells are electrically excitable cells that method and transmits information by electrical and…
Q: EPSP acilitates depolarization of postsynaptic mem ne by increasing the permeability of the membrane…
A: Answer. The correct answer is option (d) An EPSP facilitate depolarization of the postsynaptic…
Q: You are a neuroscientist and have been provided a sample of a new snake venom. You test its effect…
A: Introduction A neurotransmitter is a chemical messenger that transports, enhances, and balances…
Q: When the action potential begins, Na+ gates open, allowing Na+ to cross the membrane. The charge…
A: Membranes potential can be defined as the change in electric potential due to changes in the amount…
Q: Which of the following best describes saltatory conduction? A process in myelinated axons where the…
A: In contrast to the slow continuous process of depression extending down an unmyelinated axon,…
Q: Action potentials travel only along myelinated axons; unmyelinated axons do not support action…
A: An action potential is a sudden increase and eventual fall in voltage or membrane potential over a…
Q: If the middle of an axon were depolarized to threshold, in which direction could the action…
A: Neurons are the basic unit of the nervous system. They are involved in the transmission of nerve…
Q: Select one: O A. hyperpolarizing phase; K channels open B. hyperpolarizing phase: Na channels open…
A: The action potential is the change in the electric potential across the plasma membrane.
Q: During an IPSP, the postsynaptic membrane becomes more permeable to GABA. O Ca2+. Na+. O K+.…
A: The IPSP stands for Inhibitory postsynaptic potential. It occurs when ion channels open resulting in…
Q: Inhibitory postsynaptic potentials (IPSP) are associated with depolarization repolarization…
A: Exchange of information between two or more nerve cells takes place at the synapse, which is the…
Q: Immediately after an action potential has peaked, which cellular gates open? O calcium Ochloride O…
A:
Q: If an axon ([Na+]in = 200 mM) is bathed in solution consisting of [Na+]out = 10 mM, will there be an…
A: Action potentials are nothing but the electrical impulses that transmit signals around the body.…
Q: is it possible for a second action potential to start during the refractory period?
A: The resting membrane potential between the inner and outer side of the neural membrane is balanced…
Q: An action potential is generated at the... trigger zone of the axon postsynaptic membrane cell body…
A: Neurons are the excitable cells within the nervous system. When a neuron is triggered, it propagates…
Q: What type of interaction is occurring at the trigger zone between two graded potentials arriving…
A: Action potential : As the signals are passed through the neurons, a massive increase in membrane…
Q: Neurotransmitters Synaptic vesicle Neurotransmitter re-uptake pump Ахon Voltage- gated Cat+ channel…
A: Introduction :- The chemical messengers of the body are typically referred to as neurotransmitters.…
Q: Which statement below best describes why action potentials travel in only one direction? O The…
A: Action potential refers to the rise in the electrical activity from a resting state due to an…
Q: Determine whether each description refers to local (graded) potentials, action potentials, or both.…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: Explain what will happen in an axon undergoing an action potential but which is unable to utilise…
A: Neurons are responsible for the electromagnetic conduction of the signals in the form of stimulus.…
Q: Which statement is true regarding chemical neurotransmission? O An IPSP closer to the soma will…
A: The cells of the nervous system have a significant functionality i.e. Communication. At the neuronal…
Q: Blocking KCa2 (SK) channels will typically ________ a neuron's firing rate Increase…
A: SK (KCa2) channels are the calcium activated potassium channels. In other words SK channels can be…
Q: When a graded potential summates to threshold at the axon hillock, O ligand-gated Ca+2 channels…
A: The rapid change in membrane potential is known as an action potential. It is governed by the…
Q: During the refractory period a) if a neuron reaches threshold the action potential goes to…
A: Neurons are the cells of the nervous system.
Q: B A EPSP EPSP IPSP Y Axon - hillock Axon- Will it be likely to produce an action potential in neuron…
A: As per bartleby guidelines we are suppose to answer only 3 subparts of a particular question please…
Q: Resting potential is a balance across the axon membrane between______forces moving ions out of the…
A: A cell's resting membrane potential is defined as the electrical potential difference across the…
Q: Which factors contribute to an axon’s conduction velocity?
A: Neuron generate electrical signal for a stimulus, possess electrical excitability and convert it…
Q: The membrane voltage at the axon hillock is not affected by_ O a. EPSPS b. temporal summation OC.…
A: Hello. Since you have asked multiple questions. We will be able to answer only the first one. for…
Q: Local potentials are produced by ligand-gated channels True False
A: Ligand-gated ion channels (LGICs) are basic membrane proteins that contain a pore which permits the…
At the membrane of an axón, the action potential is -60 mV for K+ ions.
Calculate de external and internal concentration radios.
Step by step
Solved in 2 steps
- Saltatory conduction (a) requires more energy than continuous conduction (b) occurs in unmyelinated neurons (c) occurs when the action potential jumps from one node of Ranvier to the next (d) slows transmission of an impulse (e) depends on the action of GABAA neuron responds to adequate stimulation with _______, a type of self-propagating signal.When action potentials arrive at a synapse between a neuron and another cell, they stimulate the release of molecules of a ________ that diffuse over to that cell.
- 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?Figure 35.11 Potassium channel blockers, such as amiodarone and procainamide, which are used to treat abnormal electrical activity in the heart, called cardiac dysrhythmia, impede the movement of K+ through voltage-gated K+ channels. Which part of the action potential would you expect potassium channels to affect?Assume presynaptic excitatory neuron A terminates on a postsynaptic cell near the axon hillock and presynaptic excitatory neuron B terminates on the same postsynaptic cell on a dendrite located on the side of the cell body opposite the axon hillock. Explain why rapid firing of presynaptic neuron A could bring the postsynaptic neuron to threshold through temporal summation, thus initiating an action potential, whereas firing of presynaptic neuron B at the same frequency and the same magnitude of EPSPs may not bring the postsynaptic neuron to threshold.
- 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?A change in the axon membrane potential from -70 mV to -64 mV would be called a depolarization polarization hyperpolarization potentialIf an axon ([Na+]in = 200 mM) is bathed in solution consisting of [Na+]out = 10 mM, will there be an action potential if a supra-threshold stimulus (changed Vm to -20 mV with opening of Na channels) is injected into the axon?
- The absolute refractory period of an action potentialA. only ensures one-way travel down an axon.B. only allows a neuron to ignore a second signal sent that closely follows the first.C. only prevents summation of action potentials within the axonD. ensures one-way travel down an axon and allows a neuron to ignore a second signal sent that closely follows the firstE. ensures one-way travel down an axon, allows a neuron to ignore a second signal sent that closely follows the first, and prevents summation of action potentials within the axonThe initial rise in the membrane potential of an axon upon stimulation is called the........... phase of the ...............Why are action potentials usually conducted in one direction?(A) Ions can flow along the axon in only one direction.(B) The brief refractory period prevents reopening of voltagegated Na+channels.(C) The axon hillock has a higher membrane potential thanthe terminals of the axon.(D) Voltage-gated channels for both Na+and K+open in onlyone direction.