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Depolarisation occurs as ions cross the membrane of a cell or a nuron. Ions such as NA+ or K+ make depolarisation happen. Depolarisation can work on a threshold potetional such as in the heart. Threshold potetional A threshold potetional is a self- regenerating wave of electrical current depolairsation. In the hearts cells depolarisation happends when the cells of the heart are brought to a voltage threshold because of NA+ ions.Soduim NA+ is a soft, silvery-white powerderd ion. Soduim is found in sea water and also in rocks. Liquid soduim is used for depolarisation of the heart and is a clear liquid.

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Q: When does Depolarization occur?
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What cell structure is used to prepare for depolarization?

The cell structure used to prepare for depolarization is the sodium-potassium pump, which actively transports sodium out of the cell and potassium into the cell to establish the necessary concentration gradients for depolarization to occur.

When does arterial depolarization occur?

Arterial depolarization occurs when action potentials are generated in the cardiac cells of the heart during the electrical conduction system, leading to the contraction of the heart muscle. This depolarization occurs as the electrical signal travels through the atria and then the ventricles, causing them to contract and pump blood.

What is depolarization of a neurotransmitter?

Depolarization of a neurotransmitter refers to the shift in the electrical charge of the neuron, making it more likely to generate an action potential. This can occur when a neurotransmitter binds to its receptor on the postsynaptic membrane, causing ion channels to open and allowing the influx of positively charged ions. This depolarization triggers a series of events that lead to the transmission of the nerve signal.

Why don't the terms depolarization and action potential mean the same thing?

Depolarization occurs when a stimulus opens sodium channels which allow more sodium to go into the membrane making it less negative and more positive (toward reaching threshold). An action potential can only occur once the membrane reaches threshold which means it has reached the level needed through depolarization. An action potential is a brief reversal in polarity of the membrane making the inside more positive and the outside more negative, the reverse occurs again once the membrane reaches resting potential.

What is the stage in an action potential that immediately follow depolarisation?

The stage that immediately follows depolarization in an action potential is repolarization. During repolarization, potassium ions move out of the cell, causing the membrane potential to return to its resting state.

Is depolarization the resting state of the p wave?

No, depolarization is not the resting state of the P wave. Depolarization is the process where the heart muscle contracts in response to an electrical signal. The P wave represents atrial depolarization, the electrical activity that triggers the contraction of the atria in the heart.

The greater influx of sodium ions results in what of the membrane?

The greater influx of sodium ions results in membrane depolarization. This is because sodium ions carry a positive charge, which leads to a decrease in the membrane potential towards zero or a positive value.

What ion channel enables depolarization?

Voltage-gated sodium channels enable depolarization in excitable cells by allowing an influx of sodium ions, which leads to the rapid depolarization phase of an action potential.

What is an antonym for polarization?


The QRS complex in an electrocardiogram results from?

An Electrocardiogram of a single heart beat shows three distinct waves. These are the P, QRS and T Waves. The QRS wave (normally the largest spike) in the electrocardiogram, is that of the ventricles depolarizing and contracting.

The portion of the ECG that corresponds to atrial depolarization is the?

P wave corresponds to atrial depolarization in an ECG.

What is ventricle depolarization?

Type your answer here... abnormally slow depolarization of the ventricles would most change the shape of the ?in an ekg tracing