Biology - Respiration in mammals

Carbon Dioxide and Water are Waste products

Glucose + Oxygen -- Carbon Dioxide + Water + Energy

Happens all the time in the cells

Most Reactions happen inside the Mitochondria

Energy released can be used to build larger molecules

Exercise

Oxygen and Glucose must be delivered more quickly

Waste Carbon Dioxide must be removed more quickly

The Increased Heart rate increases the rate of blood flow

Increased rate of breathing increases rate of Gaseous Exchange in the lungs

During Exercise the muscle cells respire more than they do at rest

Muscles

Store Glucose as Glycogen

Glycogen can be converted back to Glucose for use during exercise

When insufficient amount of oxygen reaches the muscles

Involves the incomplete breakdown of glucose

Releases 5% of the energy released by Aerobic Respiration per molecule of glucose

Waste Product is Lactic acid

Glucose -- Lactic acid + Energy

Muscle Fatigue

Muscles become tired after exercise so they dont contract as efficiently

Lactic acid

Removed by blood flow through the muscles

Oxygen Debtt

The Amount of oxygen needed to Oxidise lactic acid to carbon dioxide and water

Explains why we breath quickly after exercise