Kinesiology 3339A/B Lecture : Exercise Nutrition - Lecture 24

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oliveant147

9 Jan 2012

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Covers some aspects of fat that may lead to exercise performance. will increase the amount of acetylecholine and reduce fatigue. however, unsure of whether it has any value. Omega-3s: potential for health and potential to effect performance. Increase blood flow and oxygen delivery to muscle: unsure whether it will enhance performance. Increasing carnitine may facilitate fat uptake into mitochondria: lots of carnitine in diet no increase in fat uptake or utilization. because it increases just blood carnitine, not amount in mitochondria y therefore, it doesn t help with exercise performance. Caffeine supplementation: does enhance several types of performance, at one time, it was banned by ioc as a doping agent. people were disqualified if they were caught with metabolites of caffeine in urine: still banned in some other corporations, no longer banned with ioc because it s found in a lot of food products that people consume.

Related Questions

during a long distance run, increased uptake of fatty acyl COA intomuscle mitochondria occurs. which of the following helps to explainthis:
a. AMP is decreased
b. increased carnitine: palmitoyltansferase I activity
c. the activity of AMP-dependent protein kinase is decreased
d. a higher malonyl CoA concentration
e. Carnitine-acylcarnitine translocase is inhibited

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 âSprintex.â The label states that consuming this supplement will âturbocharge your mitochondria.â What effect would this supplement have on the athleteâs 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

yellowturtle282

30. In final step of the triacylglycerol biosynthesis, which of the following is added to the diacylglycerol?

A. Acetyl-CoA

B. Phosphatidic acid

C. Fatty acyl-CoA

D. Glycerol-3-P

31. The activation of long chain fatty acids requires which of the following?

A. 2 ATPs

B. 2 ATPs and Co-A

C. 2 ATP, CoA and fatty-acyl CoA

D. 2 ATPs and a fatty acid.

32. What is the metabolic pathway that does not involve succinyl-CoA?

A. Ketone bodies to acetyl CoA

B. Odd chain fatty acid oxidation

C. Even chain fatty acid oxidation

D. TCA cycle

33. In order to break down fatty acids, they are first transported into the mitochondrial matrix by conversion of the fatty acid from a covalent complex with CoA to one with:

A. Citrate.

B. Oxaloacetate.

C. Malate.

D. Carnitine.

E. Pyruvate.

34. Regarding carnitine shuttle, the enzyme translocase involves which of the following pair?

A. Fatty acyl & CoA

B. Fatty acyl-carnitine & carnitine

C. Fatty acyl CoA & carnitine

D. Fatty acyl & carnitine

35. The family of drugs that are called "statins" (e.g. lipitor) are effective at lowering plasma levels of cholesterol because they:

A. slow the rate of cholesterol uptake from plasma into the cell.

B. increase the rate of synthesis of cholesterol inside the cell.

C. inhibit the activity of a key enzyme in the cholesterol synthetic pathway.

D. prevent the synthesis of Mevalonate

Kinesiology 3339A/B Lecture : Exercise Nutrition - Lecture 24

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