Multiple Choice
Muscles with parallel fascicle arrangement tend to shorten a great deal upon contracting; thus, these types of muscles tend to be very powerful.
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10. Muscles
Fascicle Arrangements
Struggling with Anatomy & Physiology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Sphincters have a __________ arrangement of fascicles.
A
circular
B
pennate
C
parallel
D
convergent
Verified step by step guidance1
Understand the structure and function of sphincters in the human body. Sphincters are circular muscles that control the passage of substances by opening and closing.
Recognize that the arrangement of muscle fascicles (bundles of muscle fibers) determines the shape and function of the muscle.
Identify the different types of fascicle arrangements: circular, pennate, parallel, and convergent.
Circular arrangement: Fascicles are arranged in concentric rings, typical of sphincters, which control openings and closings in the body.
Conclude that sphincters have a circular arrangement of fascicles, as this structure allows them to effectively open and close passages.
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