The electron micrograph shows parts of some myofibrils in a striated muscle that is in a relaxed
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The electron micrograph shows parts of some myofibrils in a striated muscle that is in a relaxed state.
a. i. Name the parts labelled K, L and M.
ii. How many myofibrils are visible in the electron micrograph? Explain your answer.
b. i. There are many glycogen granules and mitochondria visible in the electron micrograph. Explain why they are both there.
ii. Describe how you can tell that this electron micrograph is from relaxed muscle and not contracted muscle.
c. The electron micrograph is magnified 20 000 times. Calculate the actual length of the sarcomere which includes the region labelled K. Give your answer in micrometres (μm).
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Related Book For 
Cambridge International AS And A Level Biology
ISBN: 9781107636828
4th Edition
Authors: Mary Jones, Richard Fosbery, Jennifer Gregory, Dennis Taylor
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