Answered: Repolarization of an axon during an…

Repolarization of an axon during an action potential is produced by a. inward diffusion of Na+. b. active extrusion of K+. c. outward diffusion of K+. d. inward active transport of Na+.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter16: The Body's System

Section: Chapter Questions

Problem 24RQ: Neurons contain ________, which can receive signals from other neurons. a. axons b. mitochondria c....

See similar textbooks

Related questions

Q: When a neuron is at rest,_____ . a. it is at threshold potential b. voltage-gated sodium channels…

A: Introduction Chloride is the most abundant anion in the extracellular fluid. Along with Chloride…

Q: After the action potential reaches its peak, the potential across the membrane falls toward its…

A: The action potential is defined as the electrical signaling, which occurs in the neuronal cells, due…

Q: neuron

A: An action potential is triggered by a graded potential that causes the membrane to depolarize until…

Q: A common feature of action potentials is that they(A) cause the membrane to hyperpolarize and then…

A: Plasma membrane always try to maintain potential difference between the sides of the extracellular…

Q: Action potentials are normally initiated at the axon hillock because a. there is a particularly high…

A: When the membrane potential of a given cell location rapidly rises and falls, an action potential…

Q: increases the probability of producing an action potential, where a ________ decreases the…

A: Depolarization increases the probability of producing an action potential, where a hyperpolarization…

Q: A change in the voltage across a neuron’s plasma membranethat makes the neuron less likely to fire…

A: The neuron is the structural and functional unit of the nervous system. The neuron is also known as…

Q: Explain how the sodium–potassium pump and the properties of the membrane lead to the resting…

A: Sodium-Potassium pump is an active transport mechanism, which takes place in the cell membrane of…

Q: Describe how action potentials are conducted by unmyelinated nerve fibers. Why is saltatory…

A: Introduction :- Conductability is the capacity to conduct the electrical along it's pathway. The…

Q: А X Information given: An EPSP from neuron A causes a 10 mV change (from RMP); an IPSP from neuron B…

A: A stimulus is generated due to the sudden environmental changes which can excite a nerve or an…

Q: At maximal stimulation, much above threshold, how long will it be until an axon fires the next AP?…

A: The action potential is defined as the quick variation in the membrane potential that occurs when a…

Q: Describe how the permeability of the axon membrane to Na+ and K+ is regulated and how changes in…

A: Introduction Sodium and Potassium are the two most important ions which plays a crucial role in…

Q: Neurotransmitters are released by_____ . a. axon terminals c. dendrites b. a neuron cell body d.…

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: What is the point A on the graph? Define this term. B) What ions are moving at B on the graph, what…

A: Action potential An action potential is defined as the sudden rise and fall in the membrane…

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: Which of the following statements is TRUE of the action potential?

A: Sodium –potassium pump is one of the major biochemical pathways leading to critical physiological…

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 one of the following statements about the propagation of the action potential is incorrect? O…

A: The action potential is any shift in the membrane potential due to an increase or decrease of…

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: 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: What guarantees that there are unidirectional action potential? A. threshold B. depolarization…

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

Q: When summation of multiple graded synaptic potentials occurs which of the following would…

A: Post synaptic potentials or PSPs are called excitatory (or EPSPs) in case they increase the…

Q: Describe the four stages of an action potential in what is happening in each stage

A: The nerve impulse is changed in membrane voltage. Normally all the cells have a change in the…

Q: In SA nodal cells the upstroke of the action potential: A)is characterized by a substantial…

A: The sino atrial node is the pacemaker of the heart. The cells of the sea node have a particular…

Q: After the depolarisation phase of an action potential, the resting potential is restored by ______.

A: Introduction An action potential is defined as a sudden fall or rise in the potential of the…

Q: Discuss the importance of the sodium-potassium pump in the establishment of resting potentials and…

A: Neurons are responsible for the electromagnetic conduction of the signals in the form of stimulus.…

Q: List the membrane potential value that would coincide with the following events: a. Resting…

A: The neurons have the tendency to transmit the physical stimulus in the form of an electrical…

Q: During the rising portion of the action potential, which ions are moving across the membrane and in…

A: Action potential exhibits the potential difference across the membrane of a neuron.

Q: During a relative refractory period of an action potential A. Another action potential can be…

A: Action potential (AP) is the mode through which a neuron transports electrical signals. It is…

Q: In the membrane of a neuron, what happens during an IPSP? A. All the ion gates in the membrane…

A: The nerve tissue is made up of many nerve cells called as neurons. These neurons are the structural…

Q: What is the difference between inactivate and closed Na+ channels?Explain how a salty flavor is…

A: Sodium channels are the proteins found in the plasma membrane of a cell that forms an ions channel…

Q: Use Figure Q1(b) of an action potential to answer questions (1) until (iv) below. Choose the correct…

A: Nerve impulse refers to an electrical or chemical signal that is transmitted along a fibre. The…

Q: How much of a change in the membrane potential is necessary for the summation of postsynaptic…

A: Resting membrane potential of a cell is the electrical potential difference existing across the…

Q: - The velocity of action potential is high in: a- Myelinated-small diameter neuron b-…

A: Introduction:- Neurons, which are brain cells, transmit information and instructions throughout the…

Q: The primary difference between an EPSP and an IPSP is the a) overall speed b) degree of effect c)…

A: EPSP = Excitatory postsynaptic potential. IPSP = Inhibitory postsynaptic potential . EPSP…

Q: One EPSP from neuron A depolarizes the initial segment of a neuron by +2 mV, one EPSP from neuron B…

A: 4) Mechanism of nerve conduction : • The action potential in pre synaptic neuron reaches its…

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: a) How does a CAP differ from a single action potential? b) Action potentials are said to be all or…

A: a*A compound action potential (CAP) is a signal from a nerve trunk which is made of numerous axons.…

Q: Post-synaptic acetylcholine receptors are blocked by A.Calcium ions B.Atropine C.Nerve gases…

A: Acetylcholine is the chief neurotransmitter of the parasympathetic nervous system that controls the…

Q: The level of depolarization at which an action potential will be triggered is referred to as the…

A: Action potential develops only when the membrane acquires a more positive charge inside.

Q: The following graph shows that if a neuron is depolarized briefly and then hyperpolarized slightly,…

A: In nerve cells, Na+ is important for generation of the action potential. As the Na+ current is…

Q: During saltatory conduction, action potentials are generated: a. along the entire length of the…

A: A neuron is the functional unit of the nervous system. Neurons are excitable cells that transmit…

Q: What happens when a resting neuron’s membranedepolarizes?(A) There is a net diffusion of Na+out of…

A: The membrane potential is the net voltage on the membrane of a neuron. The difference in the charge…

Concept explainers

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.

Question

Repolarization of an axon during an action potential is produced by
a. inward diffusion of Na+.
b. active extrusion of K+.
c. outward diffusion of K+.
d. inward active transport of Na+.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.

Similar questions

Neurons contain ________, which can receive signals from other neurons. a. axons b. mitochondria c. dendrites d. Golgibodies
A common feature of action potentials is that they(A) cause the membrane to hyperpolarize and then depolarize.(B) can undergo temporal and spatial summation.(C) are triggered by a depolarization that reaches threshold.(D) move at the same speed along all axons.
a.Would an action potential travels faster in an axon with a wide diameter or a small diameter? b. Would an action potential travel faster in an axon that is myelinated or unmyelinated?
Post synaptic neurons membrane potentials are less negative than resting membrane potentials when this occur A. Creates a new set point for the resting membrane potential B. Has a lower propensity to produce an action potential C. Reacts by generating action potential D. Higher chance of reaching the potential threshold
Sequence the following list of events of a neuronal action potential by placing 1 next to the first event, 2 next to the second event, and so on. a. _____ The activation gates of voltage-gated Na+ channels open, Na+ flood the cytoplasm, and depolarization occurs. b. _____ K+ continue to flow out of the axon until the membrane is hyperpolarized. c. _____ Local potentials cause the membrane to depolarize to threshold. d. _____ The inactivation gates of voltage-gated Na+ channels close as voltage-gated K+ channels open, K+ begin to exit the axon, and repolarization begins. e. _____ Repolarization continues and Na+ channels return to resting
When summation of multiple graded synaptic potentials occurs which of the following would "neutralize/cancel out" an EPSP in dendrites? A. opening a voltage gated sodium channel B. opening a voltage gated calcium channel C. openning a ligand gated calcium channel D. closing a ligand gated potassium channel E. opening a ligand gated chloride channel
There is a type of toxin found in the liver of the puffer fish that prevents the opening of voltage-gated Na+ channels in neurons. The effect of this toxin is to: Group of answer choices A. prevents the initiation of the action potential B. depolarizes the membrane potential and maintains it depolarized C. prolongs the return of the membrane potential to the resting level D. increases the duration of the action potential
What membrane protein of the neuron is responsible for briefly increasing the Na+ permeability of the membrane during the rising phase of the nerve impulse? a. the sodium-potassium pump b. the voltage gated potassium channel c. the voltage gated sodium channel d. the stimulus gated sodium channel e. the ligand gated ion channel
The extracellular sodium [Na+]0 is reduced in the saline bath. Following another current injection in a neuron, the membrane potential changes were recorded. a) Why has the membrane potential changed following the Na+ reduction? b) Why has the current injection produced no action potentials? c) How might you experimentally rescue action potential generation?
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.
Nerve membrane hyperpolarization after an action potential a)Is the movement of membrane potential voltage below normal resting potential voltage. b) This Is mostly due to the slow-closing of K+ channels. c)Makes it more difficult to evoke another action potential. d) This Is mostly due to the slow-closing of Na+ channels.
During saltatory conduction, action potentials are generated: a. along the entire length of the unmyelinated axon. b. regardless if threshold is reached. c. when the entire axolemma is depolarized. d. only at nodes of Ranvier of myelinated axons.