QUESTIONS

(a) The diagram below shows the arrangement of fibres within a muscle sarcomere

 

 

(i) Name the parts of the muscle sarcomere labelled A, B and C

A= , B= and C=

(2)

 

(ii) Describe what would happen to the regions labelled D and E when the muscle contracted.

(2)

 

(iii) Describe the role of Calcium ions in muscle contraction

(2)

 

  (iv) Describe the role of ATP in muscle contraction

 

   

(2)

   

 

 

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