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Unformatted text preview: b. Myosin heads = cross bridges - attach, detach, several times c. Lots of energy needed, ATP 3. Energy sources for muscle contraction a. Creatine phosphate (CP) i. Creation of ATP from ADP very quickly ii. Runs out fast b. Aerobic respiration - needs oxygen i. 1 molecule of glucose > 36 ATPs (slower then CP) c. Anaerobic metabolism - no oxygen required i. Not efficient - 1 glucose - 2 ATPs ii. Causes buildup of lactic acid 4. Motor unit - one nerve cell and all the muscle cells it stimulates...
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- Spring '08