Practice 1: Muscle Structure
Flashcard
•
Science
•
12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a myofilament?
Back
A myofilament is a filament that constitutes myofibrils, which are the basic units of muscle contraction. The two main types are actin (thin filaments) and myosin (thick filaments).
2.
FLASHCARD QUESTION
Front
What is the smallest unit of muscle structure?
Back
The sarcomere is the smallest functional unit of a muscle fiber, responsible for muscle contraction.
3.
FLASHCARD QUESTION
Front
What is a group of fascicles called?
Back
A group of fascicles is called a muscle.
4.
FLASHCARD QUESTION
Front
What is the smallest structure in muscle fibers?
Back
The myofilament is the smallest structure in muscle fibers.
5.
FLASHCARD QUESTION
Front
What is a group of muscle fibers called?
Back
A group of muscle fibers is called a fascicle.
6.
FLASHCARD QUESTION
Front
What are the two main types of myofilaments?
Back
The two main types of myofilaments are actin (thin filaments) and myosin (thick filaments).
7.
FLASHCARD QUESTION
Front
What is the role of actin in muscle contraction?
Back
Actin provides a track for myosin to pull on during muscle contraction, facilitating the sliding filament mechanism.
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