MEDICAL PHYSIOLOGY

Detailed explanation-1: -Action potentials (those electrical impulses that send signals around your body) are nothing more than a temporary shift (from negative to positive) in the neuron’s membrane potential caused by ions suddenly flowing in and out of the neuron.

Detailed explanation-2: -Correct answer: Action potential. Explanation: An action potential is a very brief shift or spike in a neuron’s electrical charge that sends a message down the axon. An action potential is the can be described as a neuron “firing.” Action potentials occur after the resting potential and before a refractory period.

Detailed explanation-3: -The action potential has three main stages: depolarization, repolarization, and hyperpolarization. Depolarization is caused when positively charged sodium ions rush into a neuron with the opening of voltage-gated sodium channels.

Detailed explanation-4: -During an action potential, the neuron’s electrical charge is a. negative and travels along the dendrite.

Detailed explanation-5: -It is called the action potential because the positive charge then flows through the cytoplasm, activating sodium channels along the entire length of the nerve fibre.