Question

Question 21

During exercise that is predominately anaerobic, pyruvate is converted to...

	A.	NAD+
	B.	ATP
	C.	lactic acid
	D.	acetyl CoA
	E.	water

Question 20

Fatty acids are allowed to enter the mitochondria only when they have a CoA group attached to them.

True

False

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 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 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