11.4: Laboratory Activities and Assignment
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Laboratory Activities and Assignment
Part 1: Review of Introduction to Skeletal Muscles
1. Label the figure showing the structure of a skeletal muscle below with the following terms:
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2. Below is a microscopic image of a longitudinal view of muscle fibers magnified by 1000x. Label the following structures on the image:
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3. Below is a microscopic image of a cross section of muscle fibers magnified by 200x. Label the following structures on the image:
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4. Label the figure showing examples of skeletal muscles below with the following terms:
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Part 2: Introduction to Skeletal Muscles Laboratory Activities
1. Examine a slide of skeletal muscle viewing muscle fibers with a longitudinal view. Illustrate the tissue and label the following structures. Indicate the total magnification of the view you illustrate in the space provided.
- muscle fiber
- striations
- nuclei
- A band
- I band
- H zone (challenge)
- Z disc (challenge)
2. Examine a slide of skeletal muscle that has been cross-sectioned. Illustrate the tissue and label the following structures. Indicate the total magnification of the view you illustrate in the space provided.
- epimysium
- fascicle
- perimysium
- muscle fiber
- endomysium
- nuclei
3. Below is electron micrograph (very high magnification - 15,000x magnification in this image) of a longitudinal view of multiple myofibrils (structures found inside of a single muscle fiber) stacked top to bottom and their component sarcomeres lined up (left to right). Work with your group to label the following structures:
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