Question 38 Which of the following statements is NOT TRUE regarding the oxygen-h
ID: 3516125 • Letter: Q
Question
Question 38
Which of the following statements is NOT TRUE regarding the oxygen-hemoglobin dissociation curve?
The curve shifts to the right during exercise due to a decrease in pH.
The curve shifts to the right during exercise due to an increase in temperature.
The curve shifts to the left during exercise at altitude.
The steep portion of the curve represents a condition where small decreases in PO2 result in rapid offloading of O2 from hemoglobin, which occurs at the tissues.
The curve for oxygen-myoglobin dissociation looks different from this curve, because myoglobin’s affinity for O2 is greater than hemoglobin.
Question 40
Improved oxygen extraction accounts for ~50% of increases in peak oxygen uptake
True
False
Question 42
An endurance athlete who is looking to improve her cardiorespiratory fitness by optimizing her training also starts taking a drug that inhibits PGC-1? activity, will likely...
A.
experience a dramatic shift of slow twitch fibers to fast twitch fibers.
B.
compromise improvements in maximal oxygen uptake.
C.
compromise improvements in fat oxidation.
D.
optimize the decrease of the oxygen deficit at the onset of exercise by taking the drug.
E.
Only B and C are correct.
Question 46
You are conducting an experiment where you randomize middle aged adults to a strength training intervention or a concurrent strength training and aerobic training intervention. The strength training of both groups is identical. The aerobic training of the concurrent training group consists of three 30 minute steady state cycling sessions per week at 60% of HRR. Which group is likely to experience more muscular hypertrophy?
A.
The concurrent training group
B.
The strength training only group
C.
Both groups would experience the same degree of hypertrophy
D.
None of the groups would experience any hypertrophy
Question 48
Respiratory acidosis is due to... (select all that apply)
A.
Increased presence of protein buffers
B.
A reduction in bicarbonate buffering capacity
C.
An increase in lactic acid production
D.
An increase in CO2 production which results in an increase in plasma H+ concentration
The curve shifts to the right during exercise due to a decrease in pH.
The curve shifts to the right during exercise due to an increase in temperature.
The curve shifts to the left during exercise at altitude.
The steep portion of the curve represents a condition where small decreases in PO2 result in rapid offloading of O2 from hemoglobin, which occurs at the tissues.
The curve for oxygen-myoglobin dissociation looks different from this curve, because myoglobin’s affinity for O2 is greater than hemoglobin.
Explanation / Answer
Question no 38
All options regarding oxygen-hemoglobin dissociation curve are true.
Question no 40
True. Improved oxygen extraction accounts for 50%increase in peak oxygen uptake
Question no 42.
Only B and C are correct.
Question no 46
C. Both groups will experience muscular hypertrophy
Question no 48
Respiratory acidosis is due to
C. An increase in lactic acid production
D. An increase in co2 production which results in an increase in plasma H+concentration
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