ANS 330 Electron Transport System

What two molecules formed in glycolysis and CAC are energy-rich molecules?

NADH and FADH2, contains a pair of electrons that have a high energy transfer potential

What happens when these electrons are transferred to molecular oxygen?

a large amount of energy is liberated, used to phosphorylate ADP

What happens during the process of electron transfer?

electrons associated with hydrogen atoms are NADH and FADH2 are donated to set of electron carriers, called the electron transport chain

Where are the components of the ETC located?

the inner mitochondrial membrane

Where are the electrons transferred from?

they are transferred from one carrier in the chain to the next

What happens when the electrons reach the end of the chain?

they combine with oxygen and protons (H+) to form water

What happens as electrons pass down the chain?

they lose much of the free energy

What happens to the lost energy?

part of the energy is captured to produce ATP, part is lost as heat

What does ETC account most for?

ETC accounts for most of body's requirement for oxygen, often referred to as respiratory chain

Oxidative phosphorylation

process by which ATP is synthesized during transfer of electrons from NADH and FADH2 to molecular oxygen