CELL RESPIRATION Flashcards
4 metabolic stages of Cellular respiration
Anaerobic respiration
Aerobic Respiration
Pyruvate oxidation
Krebs cycle
Electron Transport Chain
Anaerobic respiration that occurs in cytosol
Glycolysis
- Respiration using O2
- occurs in mitochondria
Aerobic Respiration
- respiration without O2
- occurs in cytosol
Anaerobic Respiration
Organisms in the bottom of the ocean utilizes _________ to produce energy
Sulfur
- Step-by-step breakdown of high-energy glucose molecules to release energy
- Takes place day and night in all living cells
- Occurs in stages controlled by enzymes
Cellular respiration
Breakdown of Cellular respiration
Glycolysis
Grooming phase
Krebs Cycle
Electron Transport Chain and Oxidative Phosphorylation
- splitting of sugar.
- occurs in cytosol, just outside of mitochondria
Glycolysis
migration from cytosol to matrix.
Grooming phase
mitochondrial matrix
Krebs Cycle (Citric Acid Cycle)
- Also called Chemiosmosis
- occurs in the inner mitochondrial membrane.
Electron Transport Chain (ETC)
and Oxidative Phosphorylation
Energy Currency of cells
ATP
contains potential energy, much like a compressed spring.
ATP
When a phosphate group is pulled away
during a chemical reaction
Energy is released
This cycle is the fundamental mode of energy exchange in biological systems.
ATP-ADP Cycle
is constantly
recycled in cells.
ATP
A working muscle cell recycles all of its ATP
molecules about __________.
once each minute
Different types of Cellular Respiration
Aerobic respiration
Anaerobic respiration
– Occurs in the presence of oxygen
– When chemically breaking down glucose completely, this process releases large amounts energy
- Releasing carbon dioxide and water as waste products.
Aerobic respiration
- Occurs if there is a lack of oxygen available for aerobic respiration
- Only Glycolysis occurs
- Glucose is incompletely broken down
- In this type of respiration a lot less energy is produced and most of it is lost as heat.
Anaerobic respiration
- Breaking down glucose
– ancient pathway which harvests energy
- where energy transfer first evolved
- transfer energy from organic molecules to ATP
- starting point for all cellular respiration
– inefficient
• generate only 2 ATP for every 1 glucose
– occurs in cytosol
Glycolysis
