class notes 3.31

class notes 3.31 - Biology 1006: 3/31/10 Tetny: strained...

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Biology 1006: 3/31/10 Tetny: strained contraction of muscles Attached to skeleton: movement of tendons Under voluntary control Striated or striped appearance: generally red or black colored because of the pigment Myoglobin which stores oxygen for muscle use. Red muscles for sustained muscle use o More myoglobin (muscles are more red in color) when they are used more Most prominent bands are the z bands In between the z bands are sarcomeres When muscle contracts, the distance between the sarcomere and the z bands gets smaller Posture Muscles: alternative fibers firing contracting Fatigue in striated muscles (red muscles): o Aerobic- muscles are supplied with sufficient oxygen form the blood supply. Breathing rate and heart rate increase to supply oxygen (routine activity) o Sustained or repeated muscle contractions exceed the capacity of the body to supply oxygen from the hemoglobin. Oxygen is then obtained from oxygen reserves stored in Myoglobin. The most
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This note was uploaded on 01/18/2012 for the course BIO 1006 taught by Professor Staff during the Spring '10 term at Virginia Tech.

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class notes 3.31 - Biology 1006: 3/31/10 Tetny: strained...

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