Flashcards in Anatomy & Physiology Year 2 ONLY Deck (75)
What is the only form of USABLE energy in the body?
Adenosine Triphosphate (ATP)
Which enzyme breaks down ATP?
What does the breakdown of ATP result in?
ADP + P + ENERGY
What type of reaction is the breakdown of ATP?
What is an exothermic reaction?
A compound is broken down into smaller elements as energy is released
How long does the ATP stored in the body last?
Approximately 3 seconds
Which systems works to resynthesise ATP once the body's stores run out?
What is the source of the ATP-PC system?
Which enzyme breaks down PC?
What does the breakdown of PC produce?
Creatine, Phopshate & ENERGY
What is the purpose of the energy produced through the breakdown of PC?
To help resynthesise ADP + P into ATP
Where does the coupled reaction involved in the ATP-PC system take place?
What three types of reaction are involved in the ATP-PC system?
Endothermic, Reversible, Coupled
What is an endothermic reaction?
When a group of elements combine to form a compound/the reaction ABSORBS energy
What is a coupled reaction?
Where the products of one reaction are used by another
Where is there an example of a coupled reaction in the ATP-PC system?
Where the products of the breakdown of PC (Exothermic) are used to resynthesise ADP into ATP (Endothermic)
How much PC is there stored in the body?
Approximately 8 seconds
Describe 5 advantages of the ATP-PC system
- Provides ATP quickly
- Provides energy for fast, high intensity activities.
- No harmful by-products
- PC readily available in muscle cell
- No delay for oxygen
Describe 3 disadvantages of the ATP-PC system
- Only a small amount of PC stored in muscle cells
- Small amount of ATP is resynthesized (1 mole)
- Only provides energy for maximum of 8-10 seconds
What is the energy yield of the ATP-PC system?
What is the main source/fuel for the Glycolytic System?
Stored muscle GLYCOGEN
What is the name of the enzyme that converts stored Glycogen into Glucose?
Glycogen Phosphorylase (GPP)
What is glucose converted into in the glycolytic system?
What is the name of the enzyme that converts glucose into pyruvic acid?
What is also produced as a result of converting glucose into pyruvic acid?
If there insufficient oxygen, the glycolytic system is likely to be dominant. In this case what is pyruvic acid converted into?
What is the name of the enzyme that converts pyruvic acid into lactic acid?
Lactate Dehydrogenase (LDH)
What is the energy yield of the glycolytic system?
Where does the glycolytic system take place?