BIOB34H3 Lecture Notes - Lecture 22: Myocyte, Multinucleate, Troponin
29 Nov 2016
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Animals are composed of trillions of tiny little molecule factories that transform chemical energy into order. To do this, though, we need to get food, digest/absorb it, breathe, find mates, regulate water, avoid predators, etc. We coordinate all of our cells to achieve these goals using the nervous and endocrine systems. But, we still need a way of transforming some of our chemical energy into mechanical energy. Describe the basic anatomy of striated skelatal muscle cells. Explain how muscles transform chemical energy into mechanical energy using myosin and actin proteins. Understand why electrical excitation triggers muscle contraction. Describe the metabolic pathways involved in generating atp for muscle contraction. Muscle refers to any tissue that can generate contractile force (e. g. mechanical energy) Muscle is divided into striated and smooth muscles. Skeletal muscles and cardiac muscles are striated, muscles in other organs (e. g. gut, uterus) are smooth. We are going to focus on striated muscle.
