5.4 Energy Transfer During Long Duration/lower Intensity Exercise

Question 1

Define glycolysis

Answer 1

Process in which glucose is converted to pyruvate to produce energy

Question 2

Define the Creb’s cycle and the Electron Transport Chain

Answer 2

Creb’s cycle:
Series of cyclical chemical reactions that take place in the cristae of the mitochondria

ETC:
Series of chemical reactions that takes place in the critstae of the mitochondria

Question 3

Outline stage one of the aerobic system

Answer 3

. Converts glucose/glycogen to pyruvic acid using o2
. Produces 2 molecules of ATP
. Requires 10 chemical R. = slow system

Question 4

Outline stage 2 (Kreb’s cycle) of the anaerobic energy system

Answer 4

. Takes place in the Mitochondria
. Pyruvic acid converted to citric acid
. 2 ATP produced
. Co2 + H2 ions are waste products
- Co2 exhaled + H2 ions move to the Electron Transport Chain

Question 5

Why are fatty acids the predominant energy source for low-intensity, long duration exercise

Answer 5

• more ATP can be made from 1 molecule of fatty acids than 1 molecule of glucose

Question 6

Advantages & disadvantages of the aerobic system

Answer 6

ADVANTAGES
- long duration
- high energy yield 1:38
- no fatiguing by-products

DISADVANTAGES
- moderate intensity
- delay for o2 delivery