TEST YOUR KNOWLEDGE!
You should be able to understand the fundamentals of respiratory exercise physiology.
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Question 1
The partial pressure of a gas in the blood is determined by:
A
The partial pressure of the gas in the atmosphere.
B
The dissolvability of the gas in water.
C
The concentration of hemoglobin
Question 2
Based the oxy-hemoglobin desaturation curve, mark the following statement as “true” or “false”:
In high temperatures, hemoglobin has less affinity for oxygen.
A
FALSE
B
TRUE
Question 3
Based the oxy-hemoglobin desaturation curve, mark the following statement as “true” or “false”:
The SaO2 is more sensitive to changes in oxygen levels than PaO2
A
FALSE
B
TRUE
Question 4
Based the oxy-hemoglobin desaturation curve, mark the following statement as “true” or “false”:
In low pH, hemoglobin has more affinity for oxygen
A
TRUE
B
FALSE
Question 5
Based the oxy-hemoglobin desaturation curve, mark the following statement as “true” or “false”:
Hemoglobin has less affinity for oxygen in areas of working tissue (exercising muscle)
A
TRUE
B
FALSE
Question 6
Which of the following statements is accurate regarding hemoglobin?
A
When bound to CO2, it is less favorable to bind to more CO2
B
Can bind up to 8 oxygen molecules due to co-operative binding
C
When bound to CO2, it is less favorable to bind to O2
D
Dissociates from oxygen quickly in areas of high O2 concentration
Question 7
In somebody with anemia, which of the following will you observe regarding oxygen levels?
A
Normal oxygen saturation
B
Low oxygen saturation
C
Normal oxygen content
D
Low partial pressure of oxygen
Question 8
When exercise is initiated, which of the following controllers is responsible for the increase in ventilation?
A
peripheral chemoreceptors
B
motor cortex
C
aortic bodies
D
central chemoreceptors
Question 9
During incremental exercise, which of the following breathing patterns is most likely to be observed?
A
Increase in frequency of breathing before tidal volume
B
Increase in tidal volume before minute ventilation
C
Increase in tidal volume before frequency of breathing
D
Increase in frequency of breathing before minute ventilation
Question 10
During exercise, which of the following changes are observed in lung volumes?
A
Decrease in expiratory reserve volume
B
Increase in expiratory reserve volume
C
Decrease in residual volume
D
Increase in inspiratory reserve volume
Question 11
Which of the following is an accurate description of oxygen saturation (SaO2):
A
The amount of oxygen molecules dissolved in plasma
B
The percentage of all available oxygen binding sites on hemoglobin that are saturated with oxygen
C
The percentage of free oxygen molecules that are dissolved in plasma
D
The percentage of total hemoglobin that is bound to oxygen
Question 12
During intense exercise, which mechanism(s) assist with maintaining adequate time for gas exchange in the lung?
A
Increase in cardiac output
B
Dilation of pulmonary capillaries
C
Increase in minute ventilation
Question 13
Regarding the control of ventilation, which of the following systems uses a “feed forward” mechanism:
A
Central chemoreceptor
B
Peripheral chemoreceptor
C
Motor Cortex
D
Joint receptors
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TEST YOUR KNOWLEDGE!
You should be able to understand the fundamentals of respiratory exercise physiology.