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8 Cards in this Set
- Front
- Back
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breathing muscles
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diaphragm muscle and intercostal muscles
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skeletal muscle
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contractile tissue composed of protein filaments arranged to move the skeletal system
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myofiber/sarcolemma/ T Tubules/ sarcomeres
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myofiber: a single muscle cell
sarcolemma: cell membrane covering myofiber T Tubules: areas in sarcolemma that conduct the contraction messages sarcomeres: contractile units which hold the proteins in regular arrangements (are banded/striated: built for contractions) |
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thick.thin filaments
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thick: myosin
thin filaments: strands of actin come as a pair in muscles..used in contraction contraction occurs when filaments slide past one another |
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antagonistic pair
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muscles with opposing actions working together to provide smooth and controlled movements
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energy sources for the muscle
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ATP: store energy
creatine phosphate: can store 3-5 times that of ATP stored glycogen: can store large amounts of energy (used during heavy exercizE) aerobic metabolism: doesnt sotre energy...oxygen and nutrients are constantly supplied by the blood |
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aerobic vs. anaerobic
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aerobic: metabolic pathway requires oxygen to burn glucose
anaerobic: metabolic pathways that occue in cytoplasm and burn glucose to lactic acid and release some energy |
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changing the size of a muscle
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scientists think that the number of muscle fibers we have is inherited, so we alter muscle by enlarging cells (hypertrohy: new myofibrils added to make the old ones thicker)
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