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16 Cards in this Set
- Front
- Back
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How does ATP provides energy?
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ATP is split using water to ADP and PI then the energy is let go to be used.
ATP=ADP+Pi+ENERGY |
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Why is ATP important?
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Muscle fibers use ATP to supply energy to move filaments during contraction.
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Where ATP is from?
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Made from when nutrients ( sugar and fats, or proteins) are broken down in a chemical reaction.
Energy+ADP+Pi = ATP |
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When a cell needs ATP..what happens?
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1. aerobic respiration
2. anaerobic glycolysis 3. make from stores of creatine phosphate ( CP) 4. use existing ATP stored in cells |
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anaerobic glycolysis
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cells make ATP from glucose if there is no oxygen present.
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So what is creatine phosphate?
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CP+ADP=Creatine+ATP
fastest way to make ATP for muscles but only lasts for 10 sec of intense use |
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What is anaerobic glycolytic system?
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breakdown of glucose in no-oxygen conditions produces lactic acid.
Happens in cytoplasm of fiber. only used in intense activities lasting 10-90 seconds. |
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Anaerobic Gycolysis
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only glucose can be used when there is no oxygen.
Cells convert glucose to molecules of 2 lactic acid and 2 ATP. |
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Aerobic Respiration
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Needs oxygen to make carbon dioxide and water.
occurs in mitochondria of cell makes combination of glucose and fatty acids is used for exercise lasting longer than 2 minutes |
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Glucose vs. Fats...
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6 carbon fatty acid= 50 ATP molecules
glucose=36 ATP molecules |
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Aerobic exercise is good for you because..
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increases heart rate and oxygen, endurance, energy,lose weight, and burn calories.
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Anaerobic exercise
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increases muscle mass and strength. ( weight lifting)
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Atrophy
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decrease in muscle size
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hypertrophy
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increase in muscle size ( # of myofibrils increase)
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What is difference between dark and white meat?
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Muscle cells use different sources of ATP.
WHITE: tires quickly, more actin and myosin DARK: tires slowly, myoglobin gives it red color |
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250 million skeletal muscle fibers
420000 motor neuron 600 muscle fibers |
one motor unit equals to innervates several hundreds of fibers
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