What are nerve impulses?

Question

Answer

A signal transmitted along a nerve fibre. It consists of a wave of electrical depolarization that reverses the potential difference across the nerve cell membranes.

Answer

Nerve impulse is a wall irritability( electrical disturbance that sweeps over the nerve cell .).
dendrites conduct impulse to the cell body and axon endings conduct impulse away from the cell

Answer

A nerve impulse is an electrical signal that travels along an axon. There is an electrical difference between the inside of the axon and its surroundings, like a tiny battery. When the nerve is activated, there is a sudden change in the voltage across the wall of the axon, caused by the movement of ions in and out of the neuron. This triggers a wave of electrical activity that passes from the cell body along the length of the axon to the synapse.

Answer

Nerve Impulses

Nerve impulses are electrical signals that transmit information along neurons in the nervous system. They play a crucial role in communication between different parts of the body, allowing for the coordination of various physiological functions.

Generation of Nerve Impulses

- Nerve impulses are generated when a neuron is stimulated by a signal, such as a sensory input or a chemical neurotransmitter.
- This stimulation causes a change in the membrane potential of the neuron, leading to the opening of ion channels and the flow of ions across the cell membrane.
- The resulting movement of ions creates an electrical charge, known as an action potential, which travels along the length of the neuron.

Propagation of Nerve Impulses

- Once initiated, the nerve impulse travels down the length of the neuron in a process known as propagation.
- This propagation occurs through a series of depolarization and repolarization events, where the action potential moves from one region of the neuron to the next.
- Along the way, the nerve impulse may be amplified or diminished depending on various factors, such as the diameter of the neuron and the presence of myelin sheaths.

Transmission of Nerve Impulses

- When the nerve impulse reaches the end of a neuron, it triggers the release of neurotransmitters into the synapse, the gap between neurons.
- These neurotransmitters then bind to receptors on the next neuron, causing a new action potential to be generated and the impulse to continue along its pathway.
- This process of transmission allows for the relay of information from one neuron to another, enabling complex bodily functions and responses.

In conclusion, nerve impulses are vital for the functioning of the nervous system, facilitating communication between cells and coordinating various physiological processes.

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