Is effective refractory period the same as absolute refractory period?

Is effective refractory period the same as absolute refractory period?

The absolute refractory period is a period where it is completely impossible for another action potential to be activated, regardless of the size of the trigger (stimulus). In the cardiovascular mechanism, this refractory period is sometimes called effective refractory period (ERP).

What are the two types of refractory periods?

There are two types of refractory periods; the absolute refractory period, which corresponds to depolarization and repolarization, and the relative refractory period, which corresponds to hyperpolarization.

What is the major difference between effective absolute refractory period ERP Arp and relative refractory period RRP )?

The total refractory period is comprised of the (1) absolute refractory period (ARP) or effective refractory period (ERP), which is the period during which an electrical stimulus will not elicit an AP because the membrane is not sufficiently repolarized and sodium channels have not completely recovered; (2) relative …

What determines effective refractory period?

During phases 0, 1, 2, and part of phase 3, the cell is refractory to the initiation of new action potentials. This is termed the effective refractory period (ERP). During the ERP, stimulation of the cell does not produce new, propagated action potentials.

What is an absolute refractory period?

The absolute refractory period is the brief interval after a successful stimulus when no second shock, however maximal, can elicit another response.

What is the purpose of the absolute refractory period?

The absolute refractory period is responsible for setting the upper limit on the maximum number of action potentials that can be generated during any given time period.

Why is the absolute refractory period important?

What is meant by the absolute refractory period and what causes it?

The period of time when the majority of voltage-gated Na+ channels are inactivated defines the ABSOLUTE REFRACTORY PERIOD, when no amount of depolarizing current can cause an action potential.

What is absolute refractory period and relative refractory period?

Absolute: Is the period of time during which a second action potential ABSOLUTELY cannot be initiated, no matter how large the applied stimulus is. Relative: Is the interval immediately following the Absolute Refractory Period during which initiation of a second action potential is INHIBITED, but not impossible.

What is the absolute refractory period?

What prolongs the refractory period?

Mechanism of action Procainamide blocks sodium channels and also has an effect on potassium channels and so prolongs the effective refractory period, decreases automaticity and slows conduction.

What is the purpose of absolute refractory period?

Definition: The absolute refractory period refers to a period during the action potential. This is the time during which another stimulus given to the neuron (no matter how strong) will not lead to a second action potential.

There are two types of refractory periods; the absolute refractory period, which corresponds to depolarization and repolarization , and the relative refractory period, which corresponds to hyperpolarization.

What is exactly the refractory period?

In psychology, refractory period means a delay in response. This is not something to do with our intelligence but our reaction times – this refractory period is, therefore, also to do with our nerve pathways but on a broader scale.

When does absolute refractory period occur?

The absolute refractory period refers to that period of time after an action potential when it is impossible to initiate a new action potential no matter how large the stimulus. This is a relatively short period of time that varies from cell to cell but roughly occurs approximately 1/2 to 1 msec after the peak of the action potential.

What is the relative refractory period?

Medical Definition of relative refractory period. : the period shortly after the firing of a nerve fiber when partial repolarization has occurred and a greater than normal stimulus can stimulate a second response — compare absolute refractory period.