Describe the propagation of an action potential. Contrast this eventin myelinated and unmyelinated axons?

Q: Explain what is meant by summation of graded potentials, and explain how summation may lead to an…

A: The “fundamental unit” of the nervous system is the neurons or nerve cells. These electrically…

Q: Discuss the mechanism of action-potential in neurons?

A: Introduction: All excitable tissue like nerve and muscle tissue have membrane potential. The…

Q: During an action potential, what do the transient changes in membrane e permeability allow?

A: The sudden, transitory, propagating, and fast change in the resting membrane potential is called an…

Q: The trigger for an action potential is:

A: The potential difference across a membrane is known as the Membrane Potential. Frequent, rapid…

Q: List four ways in which an action potential is different from a local potential.

A: SOME BASIC INFORMATION ABOUT A NEURON  NEURON   It is the longest cell inside the human body. It is…

Q: Explain why a single action potential reaching a synapse is unlikely to trigger an action potential…

A: A rapid or large changes in membrane potential of nerve cells during which the potential actually…

Q: Explain how action potentials move down an axon.

A: An action potential is defined as a fast, transitory propagating sudden change in the resting…

Q: Explain how action potentials are conducted by an unmyelinated axon.

A: Neurons are the basic unit of the nervous system that carry electrical stimuli throughout the body.…

Q: Describe the difference between graded and action potentials.

A: Graded potentials are caused by external stimuli (in sensory neurons) or by neurotransmitters…

Q: Define depolarization, repolarization, and the action potential.

A: Depolarization in terms of a cell can be explained by the condition of less negative charge inside…

Q: Define the terms Myelinization and saltatory conduction of action potentials?

A: Myelination and salutatory conduction have a strong effect on the action potential. It is studied…

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: Explain why the strength of an action potential doesn’t decrease as it travels down an axon.

A: Action potential involves a transient change in the potential of a neuronal membrane that is caused…

Q: What would happen if summation of graded potentials in a neuron did not occur?

A: Neurons are the basic structural and functional unit of the nervous system. The nervous stimulus…

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: Describe the changes in the neuron membrane that occur throughout the course of an action potential.…

A: The action potential is an explosion of electrical activity that is created by a depolarizing…

Q: Describe how gating of Na+ and K+ in the axon membrane results in the production of an action…

A: In reaction to stimuli, the axon membrane permeability to K+ and Na+ depends on the opening of gated…

Q: What happens at the nodes of Ranvier in a myelinated axon?

A: Introduction: Myelinated axons have microscopic gaps within them called nodes of Ranvier. These gaps…

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

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

Q: Describe how following a threshold stimulus, a action potential is carried along an unmyelinated…

A: Myelination refers to the presence of a myelin sheath on the axons. Myelin sheath is composed of…

Q: Describe how different post-synaptic potentials can be summated on a single neuron to determine if…

A: Synapse is a junction that mediates information transfer from one neuron to another neuron or an…

Q: Describe the characteristics of action potentials and explain how they are conducted by unmyelinated…

A: The minimum electrical potential required to do a muscle contraction or any action is called action…

Q: Explain why a nerve impulse travels more quicklydown a myelinated axon than down an…

A: Neurons are electrically excitable cells and these communicate with other cells through specialized…

Q: Describe in detail  the  three types of potentials seen in neurons and functions of  three  types…

A: The creation of a cerebrum signal : • dendrites: get signals from adjoining neurons (like a radio…

Q: Compare the characteristics of action potentials with those of synaptic potentials.

A: Action potential and synaptic potential are two important key terms in Human Nervous System. Here we…

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: Describe how depolarization occurs along an unmyelinated neuronal axon

A: Propagation of action potential leads to the depolarization of neuron.

Q: Describe the changes that occur during the depolarizationand repolarization phases of an action…

A: Muscle cells and nerve cells are electrically excitable. Nerve cells transmit sensory and motor…

Q: Explain the steps of an action potential

A: Whenever the neurons and the surrounding muscle cells are in a resting state and there is no…

Q: Velocity of action potential is slower in myelinated than in unmyelinated.

A: A. Velocity of the action potential is slower in myelinated sheath than in ummyelinated.

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: Immediately after an action potential has peaked, which cellular gates open? O calcium Ochloride O…

A:

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: Describe how the resting membrane potential is established and maintained in a neuron.

A: The control and coordination in humans are done by the nervous and endocrine systems. The human…

Q: explain as precisely as you can but in no more than 100 words the ionic basis of an action potential…

A: Introduction :- An action potential (AP) occurs in physiology when the membrane potential of a…

Q: Distinguish between saltatory nerve signal conduction in myelinated axons versus unmyelinated

A: Saltatory conduction is a form of nerve impulse conduction in which the action potentials are…

Q: Differentiate between Myelinated and non-myelinated axons.

A: The axon functions to transmit messages to different body parts such as muscles, other neurons,…

Q: Explain why myelinated axons can propagate (spread) action potentials faster than unmyelinated…

A: The axons of many neurons have a segmented white insulating cover over it. This is called the myelin…

Q: How can only positive ions result in depolarization and repolarization of the membrane during an…

A: Membrane potenial/ transmembrane potential/ membrane voltage in the electrical potential difference…