PNB 2250 Lecture Notes - Lecture 28: Connective Tissue, Cardiac Muscle Cell, Molecular Motor
4 Nov 2016
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Document Summary
Muscle: common solution to problem of movement and force generation, common structure and proteins, converts atp to do work, efficiency. Uses levers for mechanical advantage: cardiac, smooth, skeletal. A long arrangement of subunits: physical properties transcend individual subunits. Repeating pattern of dark and light areas. Skeletal muscle: a type of striated muscle, under voluntary control, most are attached to bones by bundles of collagen fibers known as tendons, posses internal structure of highly organized contractile myofilaments. May be made of hundred or thousands of muscle fibers bundled together and wrapped in a connective tissue covering. Connective tissue sheath is called the epimysium. Cardiac muscle: type of striated muscle, found in the walls of the heart. Involuntary muscle: cells within the muscle are called cardiomyocytes. Have a branched shape so that each cells is in contact with three of the four other cardiac muscle cells. Continued: different types of muscles are optimized for different functions.
