1 What is a resting potential a graded potenial what is an a

1) What is a resting potential… a graded potenial… what is an action potenial?

Solution

Please find the answers below:

Resting potential: The resting potential of a cell/neuron is defined as the potential difference exprienced by the cell across its membrane with respect to the matrix when the cell is at rest and does not traverse any bio-chemical information. For most of the cells, the resting membrane potential is nearly -70 mV with respect to the matrix. This results due to excessive outwards movement of sodium ions resulting in net negative potential on the membrane.

Graded potential: A graded potential are specialized types of impulse transmission modes where general rules of impulse transmission such as \"all or none\" do not apply. Unlike general potentials, the graded potential do not rely upon absolute opening/closing of voltage gated ion channels but depend upon the nature and extent of stimulus along with shape and size of the cell. These types of potentials are generally found in cells involved in constant rythemic motion such as cardiac muscle cells along with end-dendritic neurons.

Action potential: The action potential for a cell/neuron is defined as the potential difference experienced by the cell membrane when flow of bio-chemical information takes place across the cells. As the flow of information is dependent upon differential concentrations of various cations and anions across the membrane, action potential arises due to net inwards movement of sodium ions resulting in positive potential generation on the membrane with respect to the matrix. For most of the cells, the value of action potential resides nearly +40mV.

Together, these potentials help in traversing the bio-chemical information from one cell to another to relay communication.