BIOL 1002 Chapter : Chapter 40 Notes
Document Summary
Chapter 40: action and support: the muscles and skeleton: an introduction to the muscular and skeletal systems, muscles: tissues that produces movements by contracting. Composed of specialized contractile cells: skeleton: provides supportive framework for animal. Provides supportive framework so muscles can generate movements: types of muscles, skeletal muscle: Produces involuntary movements (pump blood: smooth muscle: Located in tubular organs [stomach, small intestine, large intestine, colon] Produces involuntary movements: skeletal muscle cell structure and function are closely linked, skeletal muscle attaches to the skeleton by tendons: Tendons tough cords of collagen fibers: muscle cells are among the largest cells in the human body, ranging from 10 to 100 micrometers in diameter, muscle tissue is made of: Muscle fibers: muscle cell, arranged parallel to each other. Myofibrils: intracellular contractile element; cylindrical bundles of proteins: myofibril composition: Thick filaments and thin filaments: thick filaments made of myosin proteins. Myosin heads project out from each myosin protein: thin filaments made primarily of actin proteins.
