5 Questions
Architectures of Skeletal Muscles
Circular Parallel Convergent Pennate Unipennate Bipennate Multipennate A pennate is the point of attachment of muscles to tendon Refer to Table 11.3
Create a sphincter; control material passage through an opening
Parallel muscles: fascicles run parallel to muscle’s long axis Sometimes have an expanded central belly; high endurance Convergent muscles: fascicles merge toward a common attachment site Can pull in varying directions, but not as hard as parallel muscles 6
Major action and identify 5 Part of a Skeletal Muscle
Origin Attachment to stationary end of muscle Belly Thicker, middle region of muscle Insertion Belly Attachment to mobile end of muscle Origin, insertion, and belly of biceps brachii muscle
Criteria for Naming Skeletal Muscles
Muscles are named according to any of these criteria or a combination of these criteria: Direction of muscle fibers Muscle size Muscle lo.
Architecture of Skeletal Muscles
Varied organization of fascicles (bundles of muscle fibers)
Study Notes
Lab 9: Axial Muscles
- This lab is part of BIOL21300 A&P-I Lab 9 and covers Chapter 12 (Ch12)
- Recommended exercises to complete in Ch12 include Exercise 12.1, Exercise 12.2, Exercise 12.5, Exercise 12.8, and Exercise 12.9
Learning Objectives
- Identify parts of a skeletal muscle
- Identify origin and insertion of muscles (indicated by a symbol)
- Understand how muscles are named
- Classify muscles functionally
- Describe major actions and identify representative muscles in:
- The skull
- The shoulder and chest
- The back
Test your knowledge of the axial muscles in BIOL21300 A&P-I Lab 9 with this quiz. Explore key exercises and post-lab worksheets related to Chapter 12 to reinforce your understanding of these essential anatomical structures.
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