A journey through the mechanisms of muscles and muscular contraction. I begin by outlining the key structural elements of muscle cells, including the sarcolemma, sarcoplasmic reticulum, the myofibrils and their myofilaments. I then explain the sliding filament mechanism of muscle contraction, and how it is governed by neural signals through the release of calcium. I conclude with a brief overview of the types of muscle contractions, the difference between fast twitch and slow twitch muscle fibres, and a short discussion of some metabolic aspects of muscle function, including the role of creatine phosphate. Recommended pre-listening is Episode 26: Human Organ Systems.
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Episode 2: Organic Agriculture Part 1
Episode 122: Respiratory and Circulatory Systems Part 1
Episode 121: The Biology of Pain
Episode 120: Computational Chemistry Part 2
Episode 119: Computational Chemistry Part 1
Episode 118: Cell Signalling
Episode 117: Intracellular Protein Sorting
Episode 116: The Cell Membrane
Episode 115: Special Relativity Part 2
Episode 114: Special Relativity Part 1
Special Episode: Visual Processing in Mice
Episode 113: Visual Processing
Episode 112: Introduction to Microbiology
Episode 111: Plate Tectonics
Episode 110: Weather Part II
Episode 109: Weather Part I
Episode 108: Political Institutions and Sustained Economic Growth
Episode 107: Cultural, Geographic, and Political Explanations of Poverty
Episode 106: Theories of Economic Growth and Development
Special Episode: Mario Livio on Galileo
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