What is responsible for action potentials propagating in one direction? The inactivation of voltage gated sodium channels The sodium potassium pump and the potassium leak channels The inactivation of voltage gated potassium channels The inactivation of ligand gated sodium channels The inactivation of ligand gated potassium channels

Q: What will happen when ligand gated sodium channels open on a neuron? What will enter/exit the cell?…

A: Ligand-containing ion channels bind to neurotransmitters and are open to responding to ligand…

Q: If you inhibit the closing of sodium channels what do you predict the effect on neuronal function…

A: Action potential in neuron is the direct consequence of voltage gated sodium channel. During the…

Q: The refractory period goes from "absolute" to "relative" when:   The inactivation gate of Na+…

A: Introduction: When the stimulus strength reaches at least reach the strength of threshold, there is…

Q: You are recording the resting membrane potential from a neuron placed in a petri dish. The following…

A: The correct answer to this question is option C i.e. increase concentration of K+.

Q: How does a voltage clamp work?

A: Information is communicated through neurons. They send information between different parts of the…

Q: Which phase in the generation of action potential is represented by N? +30 M N K -55 -70 Time…

A: Whenever a neuron is triggered by a stimulus, it experiences a brief shift in electrical potential…

Q: Which of the following is one major difference? [Choose ] Only action potentials cause…

A: There is difference in the concentration of ions inside and outside the each cell of body and this…

Q: You take a bite of a Fugu cake made with fresh puffer fish liver, and your lips rapidly develop a…

A: Introduction: Pufferfish poisoning can cause a constellation of symptoms including a tingling…

Q: Which of the following describes the movement of the correct ion in the falling phase of the action…

A:

Q: Which of the following ion channels are always sensitive to small changes in electric charge?…

A: Transport through the cell membrane is important for cells to supply nutrients, ions, and other…

Q: What happens to sodium channels and potassium channels during repolarization of a neuron? both…

A: Action potential generates when the neurons want to pass the information along the body from its…

Q: Graph an action potential, showing the change inelectrical potential on the y-axis and time on the…

A: Neurons communicate with each other and with the controlled organs by passing an electric current…

Q: You apply a drug to a batch of neurons and record membrane potential changes in the presynaptic and…

A: Ans: Chloride (Cl- )

Q: Tetraethylammonia, a toxin that blocks potassium channels, will More than one answer may be…

A: Introduction : There are three phases of action potential. These are depolarisation, repolarisation…

Q: What happens to the membrane potential inside and outside of the cell when K+ channels are open?

A: Potassium Channels are actually membrane proteins that allows  K+ ions to come in across the cell…

Q: What is the relationship between the sodium-potassium pump and a neuron's resting membrane…

A: The sodium-potassium pump (Na,K-ATPase) was discovered in 1957. It is required for nerve…

Q: You generate action potentials in a neuron bathed in solution in a petri dish by applying a…

A: An action potential is a rapid sequence of changes in the voltage across a membrane. This action…

Q: What is the role of maximal potassium conductance in the generation and propagation of action…

A: An action potential is an electrical signal that travels along the membrane of a neuron. It is…

Q: Describe the sequence of activation of ion channels leading to action potential propagation.

A: The action potential is produced in a nerve or muscle when it is stimulated. It is the method of…

Q: Neurons, particularly those in the brain, receive multiple excitatory and inhibitory signals. What…

A: Neurons are the basic functional unit. It is a specialized cell that is designed to transfer…

Q: During the _____ phase of an action potential, the membrane potential is more positive than the…

A: Phases of generation of action potential from resting membrane potential  Depolarisation…

Q: The ions that most contribute to the voltage properties of the neuronal membrane are: chloride,…

A:

Q: Tetrodotoxin from pufferfish is a poison that blocks voltage-gated Na+ channels. Therefore it…

A: Tetrodotoxin (TTX) is a neurotoxin with high potency. Pufferfish, porcupinefish, ocean sunfish, and…

Q: Which of the following would occur if you were measuring the voltage of a motor neuron that was…

A: They are regulated by inhibitory neurotransmitters such as glutamate and GABA. They prevent an…

Q: Which mechanism consumes energy to move ions across the neuron cell membrane? sodium-potassium…

A: There are two types of transport mechanisms- active transport and passive transport. Active…

Q: Which ion channels are controlled by change in membrane potential?     Voltage-gated channels…

A: Membrane potential can be defined as the concentration of ions across the plasma membrane and their…

Q: Which of the following does NOT contribute to the establishment or maintenance of the neuron resting…

A: The neurons are nerve cells that carry impulses in the body, they are a crucial part of the nervous…

Q: At which point in the graph do voltage-gated potassium channels open? (Base your answer to this…

A: The action potential refers to the sudden changes in the resting membrane potential of the neuron…

Q: If the neuron is stimulated such that its membrane potential changes to 50 mV, what is the sign of…

A: The membrane potential is defined as the variance in electrical potential throughout the plasma…

Q: What takes place during the depolarization phase of an action potential? How is it an example of a…

A: Introduction:To communicate and respond to the stimulus, neurons need to communicate with each…

Q: Why does an action potential move in an all-or-nothing fashion down the length of an axon without…

A: Henry Pickering Bowditch first discussed the all or none law in 1871 in heart muscle. It means that…

Q: Depolarization phase      --Click to select--   Chemically-gated potassium channels…

A: The Depolarization Phase of Action Potential Mechanism involves rush of the positively charged…

Q: If K+ channels are blocked by TEA (tetraethyl ammonium), what happens to the equilibrium potential…

A: Potassium channels These are membrane proteins which allow rapid and selective movement of K+ ions.…

Q: Choose two false statements and explain why? Toxin causes voltage-gated sodium channels to open at a…

A: The toxins present in our body affects the activity of channels present inside the membrane .

Q: What does it mean to say that action potentials are “all or none”?

A: Introduction :- A depolarizing current causes an explosion of electrical activity, which is known as…

Q: Consider the following three diagrams of a nerve cell membrane. They show resting potential,…

A: Cells are in resting membrane potential due to the differential ion concentrations inside and…

Q: You apply a new drug to a different batch of neurons and record membrane potential changes in the…

A: Permeability barrier and semi permeability of cell membrane are both maintained by lipids. only…

Q: You apply a drug to a batch of neurons and record membrane potential changes in the presynaptic and…

A: Here membrane potential raises from -70mv to - 55mv.  That means depolarization occurs.  At…

Q: Which ion channel is open at phase K? M N K - -55 -70 Time Voltage-gated ion channel specific to…

A: The graph represents the phases of action potential . Action potential is the change in the membrane…