01:119:116 Lecture Notes - Lecture 21: Skeletal Muscle, Myocyte, Cardiac Muscle
18 Jun 2020
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Document Summary
Muscle tissue generates mechanical f in response to nervous system motor output, for ex: > feeding and movement of food through digestive tract. 3 types of muscles in vertebrates: skeletal, smooth, cardiac, vertebrate skeletal muscle. Attached to bones by tendons (tough cords of connective tissue) Consists of a bundle of single long cell called muscle fiber, running parallel to the length of the muscle. Each muscle fiber is a bundle of myofibrils: structure of a muscle fiber (cell) 2. thin filaments thick filaments: composition of thin filaments: consist of. Troponin complex= set of regulatory proteins: composition of thick filaments: consist of. ~each molecule has head at one end and a tail . Tail associated with each other to form thick filament: actin and myosin proteins. Found in many cells, but most highly organized in muscle cells. Filaments arranged in way that muscle fiber has striped appearance. > skeletal muscle also called striated muscle: sarcomere is the basic unit of contraction.
