respiration and exercise

2 types of respiration

Aerobic and anaerobic

2 differences between aerobic and anaerobic respiration

Aerobic uses oxygen

Aerobic releases more energy

where does respiration occur

In every cell in the body

What is respiration

The process of transferring energy from glucose so living processes can occur

What type of reaction is respiration and why

Exothermic as energy is transferred to the environment

Equation of aerobic respiration

Glucose + oxygen—»carbon dioxide + water

Equation of anaerobic respiration

Glucose—» lactic acid

5 uses of energy

Growth

Break down large molecules

Movement

Active transport

Maintain homeostasis

What is needed more of during exercise

More energy is needed in order for muscles to contract. This means more respiration has to occur faster, therefore more oxygen needs to be supplied to cells (and more CO2 removed)

3 effects of exercise

Heart rate increases

Breathing rate increases

Breathing volume increases

What happens if there is not enough oxygen supplied

Anaerobic respiration takes place instead. As lactic acidosis is a byproduct of this reaction, it builds up creating an oxygen debt (as oxygen is needed to break lactic acid down)

What does lactic acid do

Creates muscle fatigue and stops muscle contractions

Builds up to create an oxygen debt

What is an oxygen debt

Oxygen debt is the amount of extra oxygen the body needs after exercise to react with the accumulated lactic acid and remove it from the cells. It results in muscles tiring and not contracting properly

Where is lactic acid transported to

Blood flowing through muscles transport lactic acid to the liver where it is reacted with oxygen to form glucose