
Lecture Description
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 that the smallest strands are your actin and myosin myofilaments. Its their use of calcium and ATP that causes the binding and unbinding that makes sarcomeres contract and relax.
Table of Contents
Smooth, Cardiac, and Skeletal Muscles Create Movement 1:18
Sliding Filament Model 4:52
Skeletal Muscles Are Made of Bundles of Protein Fibers 2:40
Actin and Myosin Myofilaments 3:54
Calcium and ATP Cause the Binding and Unbinding 5:05
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Course Index
- Introduction to Anatomy & Physiology
- Tissues, Part 1
- Tissues, Part 2 - Epithelial Tissue
- Tissues, Part 3 - Connective Tissues
- Tissues, Part 4 - Types of Connective Tissues
- The Integumentary System, Part 1: Skin Deep
- The Integumentary System, Part 2: Skin Deeper
- The Nervous System, Part 1
- The Nervous System, Part 2: Action! Potential!
- The Nervous System, Part 3: Synapses!
- Central Nervous System
- Peripheral Nervous System
- Autonomic Nervous System
- Sympathetic Nervous System
- Parasympathetic Nervous System
- Taste & Smell
- Hearing & Balance
- Vision
- The Skeletal System
- Joints
- Muscles, Part 1 - Muscle Cells
- Muscles, Part 2 - Organismal Level
- Endocrine System, Part 1 - Glands & Hormones
- Endocrine System, Part 2 - Hormone Cascades
- The Heart, Part 1 - Under Pressure
- The Heart, Part 2 - Heart Throbs
- Blood Vessels, Part 1 - Form and Function
- Blood Vessels, Part 2
- Blood, Part 1 - True Blood
- Blood, Part 2 - There Will Be Blood
- Respiratory System, Part 1
- Respiratory System, Part 2
- Digestive System, Part 1
- Digestive System, Part 2
- Digestive System, Part 3
- Metabolism & Nutrition, Part 1
- Metabolism & Nutrition, Part 2
- Urinary System, Part 1
- Urinary System, Part 2
- Reproductive System, Part 1: Female Reproductive System
- Reproductive System, Part 2: Male Reproductive System
- Reproductive System, Part 3: Sex & Fertilization
- Reproductive System, Part 4: Pregnancy & Development
- Lymphatic System
- Immune System, Part 1
- Immune System, Part 2
- Immune System, Part 3
Course Description
In this Crash Course series, Hank Green teaches most of what you should know about anatomy and physiology, perfect for a freshman-level biology course, or just your own curiosity about the human body.