How do nerve impulses work? What receptors do we have in our bodies? What is the endocrine system and how do hormones work? Discuss the path of blood thru the heart and how it is controlled. Ionic Basis of Nerve Impulses: Explaining How Nerve Impulses Work

The Ionic Basis for Nerve Impulses: How Nerve Impulses Function

Nerve impulses, which are electrical signals traveling along nerves and allowing communication between parts of the body, are called neuronal impulses. Although the process can be complex, it relies ultimately on the movement of electrons through cell membranes. The depolarization of the cell membrane causes the movement ofions to cause the nerve impulses to travel along it. Controlling the flow of ions across the cell membrane are ion channels. These proteins channels, embedded in membranes, are sensitive to specific ions. They allow ions to enter the cells and exit them. Depolarization is mainly a process that involves potassium and sodium ions. The cell’s interior has a lower charge than the outside when it is in rest. When these channels are opened, sodium ions can enter cells, creating an electric current, which makes the inside of membrane positive. This process is called depolarization.
Depolarization causes the voltage-gated sodium channel to open, which allows more sodium ions into the cell. Further depolarization of the cell causes a chain reaction, which propagates down the neuron. This causes the nerve impulse of spreading to spread by causing the neuron to repolarize as potassium ions leaves the cell. Cont…

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