What is the structure of a neuron, and how are neural impulses generated?

Answer 1

A neuron is a cell with a cyton (cell body), an axon and many dendrites. This is the structure of the neuron described generally in various books and this type of neuron is called multipolar neuron.

If the axon is covered with a fatty covering, it is called myelinated neuron and that covering is called myelin sheath. If no such covering is present, then it is a nonmyelinated neuron. The figure above shows myelinated neuron, which has a higher conductivity because of the insulating sheath on it.

Conduction of neural impulse depends upon the following factors:

Concentration of Na+ and K+ ions

Membrane permeability

The conduction takes place through the Na+/K+ pump. 3 Na+ get out of the axon and 1 K+ gets inside in response to a stimulus. This changes the overall ionic balance of the cell and hence generates an action potential.

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Answer 2

Sebastian Alvarez

A neuron is made up of a cell body, dendrites, and an axon. The axon sends signals to other neurons, and the dendrites receive signals from other neurons. The process by which neural impulses are produced is known as an action potential. Upon receiving a signal, a neuron's membrane ion channels open, allowing ions to enter and exit, altering the membrane's electrical charge. If this charge difference exceeds a threshold, the action potential is triggered, and an electrical impulse is sent down the axon.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.