Question

a researcher is trying to isolate the neural pathways that control movement in the lower legs. to do this, he conducts a clinical experiment in which he electrically - stimulates different locations in the spinal cord of his subjects and observes their responses. when they experience movement in their lower legs, he identifies the exact location of the stimulation to see if it is reproducible in later research. because he is manipulating a variable, his experiment can show a clear cause - and - effect relationship between the stimulation and the movement. elimination tool select one answer a myasthenia gravis b etatque de nervios c depolarization d action potential

Explanation:

The researcher is working on neural pathways and electrical - stimulation in the spinal cord. Depolarization is a key electrical event in neurons during which the membrane potential becomes less negative. In the context of neural stimulation and movement, depolarization is likely to occur when the spinal cord is electrically stimulated to trigger movement. Myasthenia gravis is an autoimmune disease, ataxia is a neurological sign related to lack of muscle control, and action potential is the full - blown electrical signal after depolarization. Depolarization is the most relevant here as it is the initial electrical change in the neuron due to stimulation.

Answer:

C. depolarization