Question

External stimuli are communicated to the brain by means of electrical signals propagating along nerve cells at a speed of approximately 32 m/s. Similarly, electrical messages are sent at the same speed from the brain along nerve cells to the muscles. Reflex actions are controlled by a relatively simple nerve circuit from a muscle to the spine and back to the muscle. Estimate the reflex time for a stimulus at the knee. (assume that the signal resulting from the stimulus must travel a distance δs = 1 m.

Answer 1

Answer;

= 31.25 ms or 0.03125 seconds

Step-by-step explanation;

distance = speed *time

t = x/v

= 1.0 m/32 m/s

= 3.125 x10^-2 s

= 31.25 ms or 0.03125 seconds