Voltage Gated Ion Channels Flashcards, test questions and answers

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What is Voltage Gated Ion Channels?

Voltage gated ion channels are proteins embedded in the cell membrane that allow ions to pass through and help regulate the movement of ions across a cell membrane. This is important for the correct functioning of cells, as it allows them to maintain their ionic concentrations in order to keep their internal environment stable. When a voltage is applied across a cell membrane, voltage gated ion channels open allowing specific types of ions such as sodium, potassium and calcium to move into or out of the cell depending on its electrical charge. These proteins also play a role in regulating electrical signals within cells. For example, when an action potential occurs in neurons, voltage gated sodium and potassium channels open allowing for the rapid depolarization of neurons which causes them to fire off an impulse. Additionally, these channels aid in controlling nerve conduction velocity by regulating how quickly action potentials can travel along axons. They also help control muscle excitability by controlling how quickly muscle fibers can generate action potentials upon stimulation. Voltage gated ion channels are also essential for proper regulation of cardiac function as they are involved in generating and propagating electrical currents throughout the heart which cause it to contract and relax appropriately. Without this regulation, it would be impossible for hearts to beat correctly or at an appropriate rate which could lead to various medical complications including death if left untreated. Overall, voltage gated ion channels play an important role in maintaining healthy functioning cells by helping regulate electrochemical signals both inside and outside cells which helps keep them functioning properly so they can perform vital physiological functions necessary for life. Without these proteins, life itself would not exist as we know it today.