Muscle Fiber and Sarcomere

Flashcard
•
Science
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a fascicle?
Back
A fascicle is a bundle of muscle fibers (cells) surrounded by a connective tissue sheath.
2.
FLASHCARD QUESTION
Front
What is a muscle fiber?
Back
A muscle fiber is a single muscle cell that is capable of contraction.
3.
FLASHCARD QUESTION
Front
What is a myofibril?
Back
A myofibril is a long, thread-like structure within a muscle fiber that contains the contractile proteins.
4.
FLASHCARD QUESTION
Front
What is a sarcomere?
Back
A sarcomere is the basic functional unit of a muscle fiber, defined as the segment between two Z lines.
5.
FLASHCARD QUESTION
Front
What are myofilaments?
Back
Myofilaments are the filaments of myofibrils, composed mainly of actin and myosin, responsible for muscle contraction.
6.
FLASHCARD QUESTION
Front
What is actin?
Back
Actin is a thin filament protein that plays a key role in muscle contraction.
7.
FLASHCARD QUESTION
Front
What is myosin?
Back
Myosin is a thick filament protein that interacts with actin to produce muscle contraction.
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