Which list of words describes an action potential?
a)all or none, neurotransmitters, membrane potential
b)membrane potential, neurotransmitters, electrical signals
c)electrical signals, all or none, neurotransmitters
d)all or none, membrane potential, electrical signals

The answer is D. all or none, membrane potential, electrical signals

Option-D

Explanation:

Action potential refers to the potential generated across a cell membrane as a result of the difference in the membrane potential.

A neuron cell just like other cell contains the gated channels which allow the movement of ions across the membrane. As a result of the movement of ions, the membrane potential is generated in the cell which is usually -70mv.

When the stimulus causes the influx of sodium ions, the membrane potential changes and the membrane potential changes to -55 mv. This causes depolarization and a signal is generated which travels through the neurons.

This signal is transmitted through the rule of all or none in which suggests that either the neuron will generate an electric signal or not.

Thus, Option-D is correct.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.