1. Anaerobic Respiration
Noadswood Science, 2012

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

3. 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

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

5. 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)

6. 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…

7. 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

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

9. 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

10. Respiration