Aerobic Respiration

why we need aerobic respiration

-cells need constant supply of energy

-glucose is energy rich, but the cells cant use it directly

-can use ATP

cellular respiration

process where organisms break down glucose which releases energy for creating ATP

cellular respiration equation

C6H12O6 + 6O2 ---> 6CO2 + 6H2O + 30-32ATP

cellular respiration inputs

glucose, oxygen

cellular respiration outputs

carbon dioxide, water, ATP

stages of cellular respiration

1. Glycolysis

2. Krebs Cycle

3. Electron Transport Chain

glycolysis

glucose + pyruvate + 2ATP

in cytoplasm: glucose split into 2 pyruvate molecules in a series of reactions

- electrons are collected for transport to ETC

krebs cycle

in matrix: pyruvate diffuses into matrix

- krebs cycle (8 reactions) occurs

- CO2 released

- net yield 2ATP

- main purpose: collect electrons to transfer to ETC

electron transport chain

in cristae: series of proteins

- electrons flow along membrane proteins and supply energy for 26-28 ATP to be made

how build up of electrons is removed from electron transport chain

removed by oxygen, which combines with hydrogen to make water

Adenosine Triphosphate (ATP)

main energy storing molecule

- energy stored in bond between final 2 phosphates, released when bond breaks, used by cells

- MAX 30-32 ATP GENERATED