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Communication Inside the Organism : Question 1
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The following diagram shows the nerves going to and from the leg from the spinal cord.

 

section through spinal cord

 

(a) Which nerve is (i) sending information into the spinal cord and (ii) sending information to the leg from the spinal cord?

(i)

(ii)

(b) Explain what happens when the foot steps on a sharp object. Use the nerves X, Y and Z in your answer to this question.

 

 

 

 

 

 

(c) If nerve Z is cut at A, what would happen when the foot steps on a sharp object?

 

 

 

 

 

 

(d) If nerve Y is cut at B, what would happen when the foot steps on a sharp object?

 

 

 

 

 

 

(e) What other nerve connections are made with X?