Which of the following statements is true concerning acid-base balance and exerc
ID: 3516178 • Letter: W
Question
Which of the following statements is true concerning acid-base balance and exercise intensity?
As intensity increases, lactic acid production decreases.
As intensity increases, hydrogen ion production increases.
As intensity increases, pH usually increases.
As intensity increases, the carbaminohemoglobin concentration decreases.
Question 29
Which is true concerning the partial pressure for oxygen (PO2)?
A.
Is highest in systemic arteries
B.
Is reduced by half in the heart
C.
Is lowest in the lungs after inspiration
D.
Is lowest in the tissues
E.
None of the above are true
Question 30
Which of the following is not a reason stroke volume increases with acute exercise or exercise training?
A.
Increase preload (EDV)
B.
Increase plasma volume
C.
Increase venous return
D.
Increase muscle blood flow
E.
Increase afterload or peripheral resistance
Question 31
Improvements in VO2max within the first week of training can be mostly attributed to an increase in...
A.
a-v O2 difference.
B.
mitochondrial density.
C.
heart rate.
D.
plasma volume.
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.
As intensity increases, lactic acid production decreases.
As intensity increases, hydrogen ion production increases.
As intensity increases, pH usually increases.
As intensity increases, the carbaminohemoglobin concentration decreases.
Explanation / Answer
ans1- As intensity increases, hydrogen ion production increases. because increase in lactic acid cause increase in H+ ion production
ans2-Is highest in systemic arteries
ans3-Increase plasma volume
ans4--plasma volume.
ANSWER TO FIRST 4 QUESTIONS
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