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- Попередній епізод S04E83 - Structure of the Court System: Crash Course…
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24 juillet 2023 - 14:12
на 11 базах даних -
Muscles, Part 1 - Muscle Cells: Crash Course Anatomy & Physiology #21
We're kicking off our exploration of muscles with a look at the complex and important relationship between actin and myosin. Your smooth, cardiac, and skeletal muscles create movement by contracting and releasing in a process called the sliding filament model. Your skeletal muscles are constructed like a rope made of bundles of protein fibers, and the smallest strands are your actin and myosin myofilaments. It's their use of calcium and ATP that causes the binding and unbinding that makes sarcomeres contract and relax.
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
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Chapters:
Introduction: Muscle Love 00:00
Smooth, Cardiac, and Skeletal Muscle Tissues 1:18
Structure of Skeletal Muscles 2:40
Protein Rules 3:25
Sarcomeres Are Made of Myofilaments: Actin & Myosin 3:54
Sliding Filament Model of Muscle Contraction 4:38
Review 9:17
Credits 9:57
***
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