BIO 102- Midterm Exam Guide - Comprehensive Notes for the exam ( 35 pages long!)
13 Oct 2017
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Document Summary
Sarcomeres are the fundamental units of muscle contraction. Muscle - tissue composed of cells that are capable of contracting move parts of the body. Three types of muscle: skeletal, cardiac and smooth. Contractions range from quick twitches (eye blink) to powerful, sustained tension (carrying a box of textbooks) Encased in connective tissue sheaths - merge to form tendons that attach the muscles to bones. Within a muscles sheath - individual muscle cells (muscle fibers) are grouped into bundles by connective tissue. Muscle (whole organ) muscle fiber (single muscle cell - myofiber) myofibril (muscle cell organelle) sarcomere (portion of myofibril) myofilament (part of sarcomere) Blood vessels and nerves pass through the muscle in the spaces between the bundles. Each individual muscle fiber has its own connective tissue wrapping. Muscle cells - largest cells in the human body (10 to 100 micrometers in diameter) - some run the entire length of a muscle (can be over 2 feet long)
