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Flashcards from lecture notes on ATP and Enzymes.
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ATP
A substance that receives energy from energy yielding reactions and gives energy to reactions that require energy.
Adenosine Triphosphate (ATP)
The molecule in cells used for energy transfer.
Myosin ATPase reaction
The reaction involving myosin and ATP in muscle contraction.
ATPase
Enzyme that catalyzes the breakdown of ATP
Sarcoplasmic Reticulum (SR)
The re-uptake of Ca+2 into the sarcoplasmic reticulum, requiring ATP.
Adenylate Kinase (Myokinase)
An enzyme that removes ADP.
Enzymes
An enzyme that can be reused, and dramatically affected by pH and temperature.
ADP Accumulation
During vigorous exercise, ADP accumulates but can be removed in various metabolic pathways, such as ATP resynthesis from 2 ADP. ADP + ADP ATP +AMP
Adenylate Kinase
The enzyme that catalyzes the reaction ADP + ADP ATP +AMP
Anaerobic glycolysis
A metabolic process important for initial exercise, type IIb muscle fibers, and when ATP demand exceeds aerobic production.
Glycolysis
Enzyme important under 3 conditions: important for all muscles in the initial period of exercise before exercise stimulated increase in blood flow occurs which increases O2 supply to muscles; Important for the provision of energy for chemical work for type IIb muscle fibers; Important when the ATP demand exceeds the maximum rate of aerobic ATP production
Blood lactate level
The level where there is a balance between lactate production and removal.
Lactate threshold (LT)
Blood lactate kinetic is assessed during progressive exercise test conducted to maximum
Exercise Intensities <= LT
During exercise intensities < or = Lt, Exercise can be sustained for long periods of time, Main limiting factor = substrate availability
Right shift of the curve after endurance training
Indicates changes in muscle characteristics; Improvement in lactate removal and oxidation; LT determination is interesting for training follow-up.