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Exercise Phys > Energy Systems > Flashcards

Energy Systems Flashcards

(51 cards)

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1
Q

How much ATP is stored in the body

A

80 - 100 grams

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2
Q

What are the 3 systems utilized during exercise

A
  1. Creatine phosphate system
  2. Lactic acid (glycolytic system)
  3. Oxidative phosphorylation (aerobic system)
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3
Q

True or False:

We isolate these systems when using them

A

FALSE

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4
Q

True or False:

These systems interact

A

TRUE

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5
Q

Equation for creatine phosphate system

A

PCr+ADP Cr+ATP

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6
Q

True or False:

Creatine phosphate system provides immediate energy

A

True

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7
Q

When is creatine phosphate system the main source of energy

A

Extremely intense movements/exercise

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8
Q

When is creatine phosphate system no longer the primary source of energy

A

about 10 seconds

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9
Q

How long does creatine phosphate system last

A

20-30 seconds

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10
Q

True or False:

Muscle cells have more stored ATP than PCr

A

False

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11
Q

Once PCr is used to create ATP what happens

A

The remaining creatine in the cytosol is “shuttled” into the mitochondria where it picks up a Pi to make PCr

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12
Q

Cr gaining a Pi requires what type of process

A

An oxidative process

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13
Q

True or False:

Cr has to pick up a Pi in the mitochondria

A

True

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14
Q

What is another name for the lactic acid system

A

Anaerobic system

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15
Q

How is energy supplied in the lactic acid system

A

By glucose or stored glycogen in the muscles

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16
Q

How long is this the main source of energy for

A

30 - 180 seconds

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17
Q

True or False:

Glycogen within the muscle is used after glucose outside of the muscle in the lactic acid system

A

False

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18
Q

Glycolysis is the

A

Dissolution of sugar

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19
Q

How many steps are in the glycolysis process

A

10

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20
Q

What percentage of energy does glycolysis yield from on glucose

A

About 5% or Net 2-3 ATP

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21
Q

How many net ATP are gained from the lactic acid system when glucose outside the muscle is used

22
Q

How many net ATP are gained from the lactic acid system when stored glycogen is used

23
Q

What is the rate limiting step for the lactic acid system

Study These Flashcards
A

Phosphofructokinase (PFK)

24
Q

What eventually forms pyruvate

Study These Flashcards
A

Fructose 1,6-diphosphate

25
What happens when fructose 1,6-diphosphate runs low
You can't make pyruvate
26
True or False: | Lots of O2 is good for glycolysis
False
27
Is lactate bad for the body
No, it is used by the heart
28
Who has a longer lactate threshold untrained people or trained people
Trained people
29
What is the lactate threshold
When lactate particles can be found in the blood
30
What does excess hydrogen ions link up with
Pyruvate
31
Why do muscles burn during exercise
The build up of lactic acid lowers the bodies pH, but eventually the levels return to normal while resting
32
Which system is the primary means of energy production at rest
Aerobic system
33
What is the RQ at rest
0.75-0.82
34
True or False: | Oxygen consumption does not rise exponentially during the first few minutes of exercise before it plateaus
False
35
What is the non steady state also called
O2 deficit
36
What reflects a balance between energy required by the working muscles and ATP production in aerobic metabolism
Steady state
37
True or False: | No appreciable blood lactate accumulates under steady rate metabolic conditions
True
38
What is the point where the oxygen level meets the activity level
Steady state
39
What is O2 debt
The amount of oxygen that needs to be made up from the O2 deficit
40
How does oxidative phosphorylation occur
ATP is synthesized by transferring electrons from NADH and FADH2 to oxygen
41
What percentage of ATP synthesis occurs during the Kreb's cycle and ETC
90%
42
What is the net ATP production of oxidative phosphorylation
30-38 so 32
43
What is the Kreb's cycle
The process of extracting energy from pyruvate
44
What does pyruvate convert to
Acetyl CoA
45
What does acetyl CoA join with
Oxaloacetate
46
What does acetyl CoA and oxoloacetate produce
Citrate
47
How many times does citrate go through the Kreb's cycle
2
48
How many steps are in the ETC
187
49
True or False: | The majority of ATP is generated by the large amount of hydrogen created and oxidized
True
50
How many ATP does one glucose make in oxidative phosphorylation
32 net
51
What causes the energy systems to start
Small changes in ADP concentration

Exercise Phys (8 decks)

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