Question 23 The electron transport is not utilized to make ATP when at rest. Tru

Question

Question 23

The electron transport is not utilized to make ATP when at rest.

True

False

Question 24

What is the fate of lactate following exercise cessation?

Rapid removal in urine since lactic acid is harmful to the body

Converted to glucose/glycogen by the Cori cycle

Rapid lactate detoxification by the liver

Lactate is oxidized and used as a substrate and a percentage of it is used to regenerate glucose stores via the Cori cycle

Question 25

A 31-yr old female is exercising at a relatively low-intensity to maximize fat oxidation on a bike for 50 minutes (RER=0.8). Her average VO2 is 1 L/min. What is her total energy expenditure across the 50 min?

A.

250 kcal

B.

234 kcal

C.

240 kcal

Question 26

A MET is defined as a metabolic equivalent and is equal to

resting VO2

50% of resting VO2

200% of resting VO2

VO2 max

Question 27

The point at which oxygen consumption reaches its highest level (leveling off) with an increase in work load is called VO2max.

True

False

Rapid removal in urine since lactic acid is harmful to the body

Converted to glucose/glycogen by the Cori cycle

Rapid lactate detoxification by the liver

Lactate is oxidized and used as a substrate and a percentage of it is used to regenerate glucose stores via the Cori cycle

Explanation / Answer

23,false.ETC is also used at rest.A t rest the rate of flow of electron decreases but does not stop

24,the lactate is converted into glycogen or glucose by Cori cycle.

In Cori cycle the lactate is taken up by the liver where gluconeogenesis takes place producing glucose which is later converted to glycogen.

25,E energy expenditure=VO2 in L/min*RER caloric equivalent*time in min

If RER is 0.8 then RER caloric equivalent is4.8; substituting the values

E=1×4.8×50=240kcal

26,resting VO2.MET is defined as the amount of O2 consumed while sitting at rest

27,true

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