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Flashcards in Physiology Of Endurance Deck (15)
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1
Q

How doesaderosine Triphosphate produce energy

A

High energy bonds are broken enabling cross bridge cycling

2
Q

What is glycolysis?

A

Resynthesis of ATP from blood glucose or muscle glycogen

3
Q

What does glycolysis require?

A

2 ATP

4
Q

What is the net result of glycolysis

A

2 ATP molecules + 2 h+ ions + 2 pyryvate

5
Q

What are the two processes of glycolysis

A

In presence of oxygen - pyruvate is transported into the mitochondria for oxidation

Without o2 -
Pyruvale combines with NADH to form lactate and NAD+
Pyruvate +NADH +H = lactate +NAD

6
Q

The energy system that produces ATP at the fastest rate ?

A

Phosphagen system

7
Q

How many molecules does glycolysis require in the investment phase ?

A

2

8
Q

What is the negative by product of glycolysis

A

Nhh

9
Q

NADH produced in glycolysis is used during aerobic respiration in the

A

T

10
Q

What physiological changes does CPET test for ?

A

Oxygen consumption
Carbon dioxide production
Blood lactate concentrations

11
Q

What is the definition of lactate threshold (LT1) ?

A

The intensity at which lactate begins to accumulate in blood faster than it can be removed

12
Q

What is the definition of lactate turn point (LT2)?

A

The intensity that elicits a sudden and sustained increase in blood lactate concentrations.

13
Q

Why can you work below level 1 threshold for a sustained amount of time ?

A

As there is no increase in blood lactate concentrations.

Hydrogen ions are being cleared from the blood faster than they are being produced.

14
Q

What is the net result of working between LT1 and LT2 ?

A

A rise in blood lactate concentrations

15
Q

Define VO2 max ?

A

The greatest rate of oxygen uptake attained during incremental exercise .