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level: ATP in Muscle

Questions and Answers List

Question	Answer
True/False: When a muscle contracts, work is performed and energy is required.	True
True/False: Large amounts of ATP are cleaved to form ADP during the contraction process. Therefore, the greater the amount of work performed by the muscle, the lesser the amount of ATP that is cleaved.	False. The greater the amount of work = the greater the ATP. (Fenn effect)
3 sources of ATP?	Phosphagen Glycolytic Mitochondrial Respiration
Contraction cycle continues if ____ is available and ______ level in the sarcoplasm is high.	ATP, Ca2+/Calcium
Contraction cycle process: a. Myosin heads bind to actin, forming crossbridges b. As myosin heads bind ATP, the crossbridges detach from actin c. Myosin crossbridges rotate toward center of the sarcomere (power stroke) d. Myosin heads hydrolyze ATP and become reoriented and energized	a. 2. b. 4. c. 3. d. 1.
True/False: In pathways for regenerating ATP during muscle activity, the fastest pathway is aerobic respiration and the slowest is direct phosphorylation.	False. Fastest = direct phosphorylation; slowest = aerobic respiration
Determine the pathway for regenerating ATP during muscle activity	Answer
Determine the pathway for regenerating ATP during muscle activity	Answer
Determine the pathway for regenerating ATP during muscle activity	Answer