Energy Sources Flashcards
Energy released in respiration is used to form…
ATP
Respiration =
Molecules (usually glucose) are broken down to release energy
ATP=
3 phosphate groups
In cellular respiration, energy released (from glucose) is added to ADP to add another phosphate group to form…
ATP
ATP stands for:
Adenosine triphosphate
When a phosphate group splits off the ATP molecule energy is released - can be used for:
Active transport
Muscle contraction
Other energy-requiring activities in the body
Energy from repairing a molecule like glucose is converted into ATP for several reasons. ATP=
Relatively small & simple molecule
Can diffuse easily where it is needed (e.g. For muscle fibres)
Delivers energy in small, convenient amounts
Glucose is the normal source of energy and comes from…
Carbohydrates in our food
Carbohydrate = monomer and is digested to…
Glucose so that they can be absorbed into the bloodstream
Much of this glucose is then stored as the polysaccharide…
Glycogen in the liver & muscle cells
When the glucose in our blood is used for cellular respiration, glycogen is broken down to release…
More glucose to be used for respiration
Triglycerides can also be used as an energy source and most are stored in…
Adipose tissue
Triglycerides cannot be broken down as quickly as glycogen (not good for short-term exercise) it are useful for…
Long-term exercise
Aerobic respiration uses oxygen and glucose and triglycerides are respired aerobically, they can be…
Broken down completely to CO2 and Water and as much energy as possible is released from them
The maximal yield of ATP is obtained from…
Aerobic respiration
