The Sarcomere and Sliding Filaments in Muscular Contraction: Definition and Structures


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question 1 of 3

What is the functional unit of a striated muscle?

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1. Which of the following proteins are contained in the thick myofilaments of striated muscle?

2. What happens if a muscle's sarcomeres shorten?

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About This Quiz & Worksheet

This quiz and attached worksheet will help gauge your understanding of what makes muscles contract. Topics you will need to know in order to pass the quiz include the definitions of myosin and Z line.

Quiz & Worksheet Goals

Use these assessment tools to measure your knowledge of vocabulary with the following definitions:

  • Functional unit of a striated muscle
  • Protein contained in the thick myofilaments of striated muscle
  • Unit that shortens during a contraction
  • Part of a muscle smallest in diameter
  • What connects one sarcomere with another along the length of the myofibril

Skills practiced

This worksheet and quiz let you practice the following skills:

  • Reading comprehension - ensure that you draw the most important information from the related anatomy and physiology lesson
  • Interpreting information - verify that you can read information regarding muscular contraction and interpret it correctly
  • Knowledge application - use your knowledge to answer questions about sarcomeres and sliding filaments in muscular contraction

Additional Learning

To learn more about the way muscles work, review the lesson titled The Sarcomere and Sliding Filaments in Muscular Contraction: Definition and Structures, which will help you understand the following:

  • Functional unit
  • Thick filaments
  • Contractile proteins and regulatory proteins
  • I band and A band
  • Z line