Nerve Impulses Occur When a Neuron Undergoes a Change from a Resting

question 52

Essay

Nerve impulses occur when a neuron undergoes a change from a resting potential to an action potential. Discuss this progression from a resting potential to an action potential and finally to a refractory period. Include in your answer a description of each phase (resting, action, refractory), such as the ion fluxes that occur at each stage and the resulting change in membrane potential.

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Definitions:

Birds

A class of warm-blooded egg-laying vertebrates characterized by feathers, beaks, and typically the ability to fly.

Seeds

The reproductive unit of flowering plants, capable of developing into another such plant.

Thick Beaks

A characteristic of some birds that have evolved robust, heavy beaks to crush or crack hard food sources.

Chyme

Mix of food and gastric fluid.