What is a Suprathreshold stimulus?
Supra-threshold (or suprathreshold) refers to a stimulus that is large enough in magnitude to produce an action potential in excitable cells.Click to see full answer. Likewise, what is a subthreshold stimulus?Sub-threshold (or subthreshold) refers to a stimulus that is too small in magnitude to produce an action potential in excitable cells. In general, a sub-threshold…
Supra-threshold (or suprathreshold) refers to a stimulus that is large enough in magnitude to produce an action potential in excitable cells.Click to see full answer. Likewise, what is a subthreshold stimulus?Sub-threshold (or subthreshold) refers to a stimulus that is too small in magnitude to produce an action potential in excitable cells. In general, a sub-threshold stimulus leads to the depolarization of the membrane, but the magnitude of the depolarization is not large enough to reach the threshold voltage. what role does a stimulus play? The stimulus causes the cell membrane to open channels that let positively charged particles into p y g p the cell. The inside of the cell becomes positively charged compared with the outside. Other channels open and let positively charged particles out of the cell. Subsequently, one may also ask, what happens if a subthreshold stimulus stimulates a neuron? When we stimulate a neuron, enough positively charged sodium ions need to go into a cell to depolarize the membrane. A threshold stimulus increases the permeability of the sodium ion channels which caused the ion channels to open and enough of it rushes in that it leads to the reversal of the polarity of the AP.What is threshold stimulus for nerve cell?The threshold stimulus of a nerve cell is the stimulus of enough strength or high potential that produces a characteristic electric impulse i.e nerve impulse. The value of threshold stimulus is not fixed but it is usually in the range of -55 to -65 mV (millivolts).
