Anatomy - Energy Systems

Question 1

STABFEET meaning

Answer 1

Site of reaction
Type of reaction
ATP yield
Byproducts
Fuel
Enzymes
Example
Time

Question 2

STABFEET glycolytic system

Answer 2

Sarcoplasm
Anaerobic
+2
Lactic acid
Glucose
GPP, PFK, LDH
10s - 3mins

Question 3

Why is the accumulation of lactic acid harmful ?

Answer 3

It increased acidity
Decreasing PH
Denaturing enzymes
Causing you to reach OBLA and fatigue

Question 4

Describe the process that occurs in the Glycolytic system

Answer 4

Glycogen is broken down by GPP into glucose
which is broken down into pyruvic acid by PFK.
This process releases 2ATP.
Due to the lack of oxygen Pyruvic acid is broken down into the harmful by product lactic acid by LDH

Question 5

STABFEET aerobic system

Answer 5

Site - sarcoplasm and matrix of mitochondria
Type - aerobic
ATP yield - 1:38
Byproducts - CO2 + H2O
Fuel - glucose (glycogen)
Enzymes - GPP PFK and lipase
Example - marathon
Time - 3+ mins

Question 6

Advantages of the glycolytic system

Answer 6

• no o2 delivery delay
• resynthises ATP relatively quickly

Question 7

Disadvantages of the glycolytic system

Answer 7

• fatiguing byproduct of lactic acid
• does not last very long
• low ATP yield

Question 8

Describe the pathway of the AEROBIC system

Answer 8

Glycogen is broken down into glucose by GPP
which is broken down into puruvic acid by PFK gaining a net of +2 ATP.
This is then broken down to form acetyl-co-a
which forms citric acid.
From here Krebs cycle occurs giving another +2 net ATP and forming CO2 as a byproduct
next the electron transport chain occurs forming H2O as a byproduct and gaining a net +34 ATP