Question 7 In general, the higher the intensity of the activity above lactate th
ID: 3508744 • Letter: Q
Question
Question 7
In general, the higher the intensity of the activity above lactate threshold, the greater the contribution of ...
A.
anaerobic energy production
B.
aerobic energy production
C.
the Krebs cycle to the production of ATP
D.
the electron transport chain to produce ATP
E.
beta oxidation to the production of ATP
Question 8
Which of the following is not a mechanism which contributes to Lactate Threshold?
A.
Low muscle oxygen
B.
Accelerated glycolysis
C.
High glucose in the blood
D.
Recruitment of fast twitch fibers
E.
Reduced rate of Lactate removal
Question 9
The electron transport chain occurs in the...
A.
cytoplasm
B.
inner compartment of mitochondria
C.
nucleus
D.
inner membrane space of mitochondria
E.
liver
Question 11
What work rate is a 60kg male performing at when running at 6.0 mph on a treadmill (1 mph = 26.8 m/min)?
A.
360 kgm/min
B.
9648 kgm/min
C.
22.6 kcal/min
D.
Not enough information
Question 12
Which of the following is a rate-limiting enzyme in ATP-PC system
A.
oxygen
B.
phosphofructokinase
C.
creatine kinase
D.
lipoprotein lipase
E.
NAD+
A.
anaerobic energy production
B.
aerobic energy production
C.
the Krebs cycle to the production of ATP
D.
the electron transport chain to produce ATP
E.
beta oxidation to the production of ATP
Explanation / Answer
7,a,anaerobic energy system
During intense exercise there may not be enough oxygen to oxidise lactate to carbondioxide.and it may exceed the lactate threshold
,8,a,low muscle oxygen prevents clearing of lactate and causes accumulation of lactate and decreases lactate treshold
9,i inner mitochondrial membrane is the site of electron transport chain
10,work rate can be called momentum which is obtained by multiplying weight with velocity in m/min as the units in the given options are in m/min
Work rate=weight*velocity in m/min
=60*6*26.8=9658kg m/min
12,creatine kinase
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