Question

Question 13

A swimmer you are training for a 100-meter swim even reports that he is taking a supplement that improves isocitrate dehydrogenase activity. Assuming that the typical swim time for this individual is 52 seconds the likely effect would be:

	A.	Greatly improved swim performance
	B.	Worsened swim performance
	C.	No change
	D.	Not enough information

Question 14

Which of the following reactions will result in the most ATP production?

	A.	Breakdown of 30 mols of creatine phosphate (CP)
	B.	Complete oxidation of 5.0 mols pyruvic acid or pyruvate
	C.	Oxidation of 10 mols of NADH + H+
	D.	Breakdown of 2 mols of glucose to 4 mols of lactic acid

Question 15

Why does muscular work become increasingly difficult with lactic acid accumulation?

		because lactic acid causes muscle injury
		because lactic acid interferes with the diffusion of oxygen into mitochondria.
		because lactic acid causes a rise in muscle temperature with renders enzymes involved in the glycolysis and the citric cycle non-functional
		because the rising concentration of hydrogen ions leads to a drop in ph which renders enzymes involved in the glycolysis and the citric cycle non-functional

Question 16

A 100-meter sprinter that you are training reports that a friend suggested that he take a supplement called “Sprintex.” The label states that consuming this supplement will “turbocharge your mitochondria.” What effect would this supplement have on the athlete’s sprint performance?

	A.	Improve
	B.	Worsen
	C.	No Change
	D.	Can't tell

Question 17

The RQ measured for a subject who has been jogging easily at 70% VO2max for about 40 minutes and is in a steady state will likely be?

	A.	over 1.0
	B.	close to .7
	C.	close to .5

Answer 1

Answer 13

Isocitrate dehydrogenase is enzyme used in citric acid cycle, it forms alfa ketoglutarate which generates energy. this energy production will take time, but in swimming instant energy is required so this will bring no changes. option C.

Answer 14.

30 mols CP = 1x30 = 30 ATP

5 mol pyruvate = 25x5 = 125 ATP

10 moles NADH = 2.5x10 = 25 ATP

2 mol Glucose to Lactate = 2x2= 4 ATP

Answer 15.

Muscular work become increasingly difficult with lactic acid accumulation because the rising concentration of hydrogen ions leads to a drop in ph which renders enzymes involved in the glycolysis and the citric cycle non-functional.

Answer 16.

the supliment will improve the performance as the mitochondria is responsible for the synthesis of enerdy in the body.

Answer 17.

Higher the CO2 concentration more will be anaerobic respiration, so the RQ steady state will be over 1.