Anaerobic Respiration

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Glucose + oxygen -> carbon dioxide + water (+ energy)

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Presentation transcript:

Anaerobic Respiration Noadswood Science, 2012

Anaerobic Respiration Saturday, April 15, 2017 Anaerobic Respiration To know the equation for anaerobic respiration and how this is useful during exercise

Respiration Respiration is not the same thing as breathing (ventilation) Respiration is a chemical process in which energy is released from food substances, such as glucose (sugar) Aerobic respiration needs oxygen to work – most of the chemical reactions involved in the process happen in specialised cell organelles – the mitochondria

Respiration Equation Aerobic Respiration: - glucose + oxygen  carbon dioxide + water + (energy) C6H12O6 + 6O2  6CO2 + 6H2O + (energy)

Anaerobic Respiration What is anaerobic respiration? Anaerobic respiration is used if there is not enough oxygen available – it is the incomplete breakdown of glucose which produces lactic acid… glucose  lactic acid + (energy) C6H12O6  2C3H6O3 + (energy)

Anaerobic Problems Why do we not always respire anaerobically? Anaerobic respiration causes lactic acid to build up which results in cramp (muscle fatigue which causes the muscle to stop contracting efficiently) It also does not produce nearly as much energy as aerobic respiration – though is useful to allow the muscles to work a little while longer…

Heart Rate How does heart rate differ before, during and after exercise between fit people and unfit people? Design an experiment to test how you could measure this. Your results must enable you to plot a graph of pulse rate against time… Consider: - Independent and dependent variables How long the experiment will be How much exercise you will do How much recovery time you will allow What your resting pulse is You may also wish to compare different people

Fitness Fitness comparisons – recovery time is a very good indication of fitness…

Blood Glucose After digestion the pancreas produces insulin to store glucose as glycogen in the muscles During exercise the glycogen is broken back down into glucose by glucagon (produced in the pancreas) Glycogen is mainly stored in the liver but each muscle also has its own store

Respiration