The lactic acid system Flashcards

1
Q

what is another name for the lactic acid system?

A

anaerobic glycolysis

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2
Q

where does this process take place?

A

sarcoplasm

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3
Q

what does this process involve?

A

particial breakdown of glucose (food)

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4
Q

when can glucose be fully broken down?

A

when o2 is present

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5
Q

what is the purpose of the lactic acid system?

A

break down of glucose

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6
Q

why does glucose store more energy?

A

more complicated compound that pc, therefore stores more energy between its bonds

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7
Q

what is the symbol equation for glucose?

A

C6H12O6

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8
Q

what is the enzyme that breaks down this glucose?

A

Glycogen phosphorylase

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9
Q

how is the glucose broken down?

A

anaerobically

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10
Q

what other enzyme splits the other half of the molecule?

A

phosphofructokinase

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11
Q

what is phosphofructokinase activated by?

A

decrease in pc

increase in calcium (secreted during muscle contraction)

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12
Q

what is glucose broken down to?

A

pyruvic acid

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13
Q

What happens when pyruvate acid is broken down?

A

Energy and Lactic acid is released

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14
Q

Where does energy from the Lactic acid system go?

A

Breakdown of glucose bonds anaerobically releases enough energy re-sythesised 2 molecules of ATP

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15
Q

What is a weakness of this process?

A

The system takes longer than ATP-PC as there are more bonds to break, but still a very quick process

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16
Q

How long can the Lactic acid system provide energy for?

A

1-2 minutes for high intensity activitys

17
Q

What would happen to a inexperienced runner in a 400m race if they set off too fast?

A

Will immediately use up glucose store, will produce Lactic acid, drops the ph which activates the enzyme phosphofructokinase, cannot synthesis atp causing fatigue

18
Q

what are the three enzymes in this system known as?

A

glycogenphosphorylase
phosphofructokinase
lactate dehydrogenase