4.5 Cellular Respiration in Detail
KEY CONCEPT
Cellular respiration is an aerobic process with two
main stages.
4.5 Cellular Respiration in Detail
Glycolysis is needed for cellular respiration.
• The products of glycolysis enter cellular respiration when
oxygen is available.
– ATP molecules are used to split glucose
– ATP molecules are produced
– molecules of NADH produced
– two molecules of pyruvate produced
4.5 Cellular Respiration in Detail
4.5 Cellular Respiration in Detail
The Krebs cycle is the first main part of cellular
respiration.
• Pyruvate is broken down
before the Krebs cycle.
– carbon dioxide
released
– NADH produced
4.5 Cellular Respiration in Detail
• The Krebs cycle produces energy-carrying molecules.
4.5 Cellular Respiration in Detail
• The Krebs cycle produces energy-carrying molecules.
– NADH and FADH2 are made
4.5 Cellular Respiration in Detail
4.5 Cellular Respiration in Detail
Video
• http://www.sumanasinc.com/webcontent/animations/cont
ent/cellularrespiration.html
4.5 Cellular Respiration in Detail
The electron transport chain is the second main part of
cellular respiration.
• The electron transport chain uses NADH and FADH2 to
make ATP.
– high-energy electrons enter electron transport chain
– energy is used to transport hydrogen ions across the
inner membrane
– hydrogen ions
flow through a
channel in the
membrane
4.5 Cellular Respiration in Detail
4.5 Cellular Respiration in Detail
4.5 Cellular Respiration in Detail
The electron transport chain is the second main part of
cellular respiration.
• The electron transport chain uses NADH and FADH2 to
make ATP.
• The breakdown of one glucose molecule produces up to
38 molecules of ATP.
– ATP synthase
produces ATP
– oxygen picks up
electrons and
hydrogen ions
– water is
released as a
waste product
4.5 Cellular Respiration in Detail
Do the Interactive reader Question and
Text Book Questions
Reviewing > Main Ideas
1.What is the role of pyruvate in cellular respiration?
2.Describe in your own words the function of the Krebs
cycle.
3.Explain the functions of electrons hydrogen ions, and
oxygen in the electron transport chain.
4.Compare and Contrast, Describe the similarities and
differences between the Krebs cycle and the Calvin cycle?
4.5 Cellular Respiration in Detail
Do the Interactive reader Question and
Text Book Questions
Reviewing > Main Ideas
1.What is the role of pyruvate in cellular respiration?
Pyruvate, produced by the breakdown of glucose, is needed for the
Krebs cycle which is a part of cellular respiration.
1.Describe in your own words the function of the Krebs
cycle.
The Krebs cycle breaks down and extracts energy form carbon-based
molecules transfers it to the Electrons transport chain, makes a small
amount of ATP, and releases carbon dioxide.
1.Explain the functions of electrons hydrogen ions, and
oxygen in the electron transport chain.
The electron transport chain pumps hydrogen ions across the inner
mitochondrial membrane. Hydrogen ions then flow through a channel
that is bound to ATP syntheses. Oxygen picks up electrons and
hydrogen ions so that the electron transport chain can continue to
function.