How does a nervous impulse vary from hormone signal?

Nervous impulse

* Speed: Nervous impulses travel at speeds of up to 100 meters per second, while hormone signals travel at speeds of up to 1 meter per second.

* Distance: Nervous impulses can travel over long distances, while hormone signals are limited to short distances.

* Specificity: Nervous impulses are very specific, targeting specific cells or tissues, while hormone signals are more general, affecting many different cells and tissues.

* Duration: Nervous impulses are short-lived, lasting only a few milliseconds, while hormone signals can last for several minutes or even hours.

* Refractory period: After a nervous impulse has passed through a neuron, there is a refractory period during which the neuron cannot generate another impulse. This prevents the nervous system from being overloaded. There is no refractory period for hormone signals.

Hormone signal

* Speed: Hormone signals travel at speeds of up to 1 meter per second, while nervous impulses travel at speeds of up to 100 meters per second.

* Distance: Hormone signals are limited to short distances, while nervous impulses can travel over long distances.

* Specificity: Hormone signals are more general, affecting many different cells and tissues, while nervous impulses are very specific, targeting specific cells or tissues.

* Duration: Hormone signals can last for several minutes or even hours, while nervous impulses are short-lived, lasting only a few milliseconds.

* Refractory period: There is no refractory period for hormone signals, while after a nervous impulse has passed through a neuron, there is a refractory period during which the neuron cannot generate another impulse. This prevents the nervous system from being overloaded.