Question 10(b)(i)
[Maximum number: 2]
A teacher uses this method to estimate the speed of a nerve impulse.
- students stand in a circle and hold hands
- student A in the circle starts a timer and at the same time squeezes the hand of student B on his left
- when student B feels his hand being squeezed, he immediately squeezes the hand of the student on his left
- this process continues around the circle of students until student A feels his hand being squeezed and he stops the timer
Explain what other measurements the teacher would need to make in order to calculate the speed of a nerve impulse.