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The A-V O2 difference that presents during physical activity:      

Ventilatory threshold is:  

CO2 is created at rest and in exercise, it is transported for removal:

In the lungs hemoglobin does not fully saturate with oxygen because at sea level a Po2 of 100 mmhg allows only 98% saturation:    

Regarding varicose veins which of the following is/are incorrect:  

Regarding ventilation and aerobic endurance which of the following is correct:

Chemoreceptors can help to control ventilation, which of the following are correct:  

During exercise the hearts stroke volume increases, which of the following may cause this increase:  

In Charles Dickens’s A Christmas Carol, what was the first name of Scrooge?  

A patient is in the middle of a moderate to intense training session with the associated physiologic effects of that training such as temperature and acidity changes, which of the following is/are correct: