Flashcards
Exercise bioenergetics and metabolisum.
Cards in this deck (19)
- 1How efficient is ATP breakdown. Where does the rest of the energy go?34% efficient, so 66% is lost as heat.
- 2What is the difference between OBLA and lactate threshold?OBLA is the point where blood lactate reaches 4.0 mM/L where as the blood lactate threshold is the point in which we start producing any lactate.
- 3Graph the relationship between blood lactate concentration and workload during an incremental exercise tests. Suggest units for the axis. Also suggest where we might see the ventilatory break point, point of OBLA and lactate threshold.
- 4Graph the relationship between VO2 and work rate giving units you would use for each axis.
- 5Give the things which are happening during the slow stage of repayment of oxygen debt.We have elevated heart rate (requiring energy) increases body temperature (increasing metabolic), increased catecholamine levels (increased metabolism) and the conversion of lactate to glucose.
- 6Give what is happening in the rapid stage of the repayment of oxygen debt.Resynthesis of PC stores and replenishing muscle and blood oxygen stores.
- 7What does the term oxygen debt mean?The way we have to repay the oxygen deficit we encountered at the start of exercise.
- 8Do trained or untrained people have a smaller oxygen deficit upon starting exercise? Give some explanations for this.Trained have a lower deficit as they have better developed aerobic bioenergetic capacity. This results from CV adaptions, circulatory adaptions, muscular adaptions and cellular adaptions.
- 9Draw a graph to show the VO2 during the transition from rest to exercise. Also add to this graph VO2 during recovery.
- 10How might energy system contribution change between a shot put throw, 200m sprint and a marathon?shot put would be anaerobic using ATP stored in the muscle and the PC system. A 200m sprint would use mainly glycolysis. A marathon would use aerobic so oxidative phosphorylation and beta oxidation.
- 11Define Homeostasis:Maintenance of constant AND normal internal environment
- 12Give some aerobic ATP production pathwaysElectron transport chain, Beta oxidation, Oxidative phosphorylation and TCA
- 13Give methods of anaerobic ATP production.phosphocreatine breakdown and glycolysis
- 14What does the term high energy phosphates mean, where might we find some high energy phosphates?Phosphates which are connected by a high energy covalent bond, and when broken will releases energy. We find these phosphates in ATP and ADP.
- 15How do enzymes work? what is the effect of temperature and pH on their action?They reduce the activation energy required for a reaction to take place. As temperature increase enzyme activity increases up to a point but after this threshold is becomes denatured and the activity drops rapidly. This is the same with pH, although all enzymes have different optimal pH values as they all act in different ares of the body.
- 16Define anabolic and catabolic.Anabolic is the breakdown of molecules, Catabolic is the creation of molecules.
- 17Give an example of things which might vary over exercise and therefore may be referred to as being in steady state.Mean arterial blood pressure, core temperature.
- 18Define metabolism:The sum of all chemical reactions that occur in the body.
- 19Define steady state.Physiological variable is unchanging but not normal e.g. core temp may be stable but above a normal level.
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- Exersice Physiology Flashcards on Exercise bioenergetics and metabolisum., created by alexlpeart on 15/05/2013.
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