MEDICAL PHYSIOLOGY

Detailed explanation-1: -Since the height of the action potential is always the same for a given neuron, the strength of the stimulus is determined by the frequency of action potential firing. A weak stimulus would cause fewer action potentials to be fired than a strong stimulus.

Detailed explanation-2: -The action potential is an explosion of electrical activity that is created by a depolarizing current. This means that some event (a stimulus) causes the resting potential to move toward 0 mV. When the depolarization reaches about-55 mV a neuron will fire an action potential.

Detailed explanation-3: -In reality, the ability of a neuron to fire an action potential does not only depend on stimulus strength, it also depends on stimulus duration. This is because the neuron’s membrane potential has the ability to integrate its inputs over time, until it reaches the threshold potential to fire an action potential.