PQ 8.6 Respiratory Dynamics

What is the primary purpose of the body's respiratory response during exercise?

• To decrease oxygen delivery to the muscles

• To match oxygen delivery with oxygen demand

• To increase carbon dioxide production

• To reduce pulmonary ventilation

Which phase of pulmonary ventilation is characterized by a rapid increase in VE at the onset of exercise?

• Phase one

• Phase two

• Phase three

• Phase four

What primarily determines the new steady-state level of VE during exercise?

• The type of exercise

• The intensity of the exercise and the level of fitness

• The duration of the exercise

• The time of day

What are the two main factors that increase total gas exchange at the lungs during exercise?

• Increase in VE and decrease in blood flow to the lungs

• Decrease in VE and increase in blood flow to the lungs

• Increase in VE and increase in blood flow to the lungs

• Decrease in VE and decrease in blood flow to the lungs

Which factor does NOT contribute to the increased extraction of O2 at the tissues during exercise?

• Increase in PO2 gradient

• Decrease in PCO2

• Decrease in pH

• Increase in temperature

What is the Bohr shift in reference to?

• The increase in VE during exercise

• The oxyhemoglobin dissociation curve

• The decrease in blood flow to the lungs

• The increase in cellular respiration

What does the a-vO2 difference measure?

• The amount of CO2 in the blood

• The amount of O2 delivered to the muscle

• The rate of pulmonary ventilation

• The temperature of the blood

What is one observable change in respiratory function with regular aerobic training?

• Increase in VE at rest

• Decrease in VT

• Increase in VT and decrease in f

• Increase in f

Which respiratory disease is characterized by spasm of the smooth muscles and oversecretion of mucous?

• COPD

• Asthma

• Bronchitis

• Emphysema

What is a common treatment for severe cases of COPD?

• Increased exercise

• Supplemental oxygen therapy

• Decreased fluid intake

• High-intensity interval training