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Question 1

How does pulmonary ventilation relate to intensity of exercise?

Answer 1

Pulmonary ventilation is the exchange of air between the lungs and the environment, including inhalation and exhalation. This can be matched to our intensity of exercise very closely.

Question 2

What two main factors affect external respiration at the lungs?

Answer 2

The increase of:
- VE (ventilation)
- blood flow to the lungs.

Question 3

Extraction of oxygen from the tissues is increased due to which four main factors?

Answer 3

• Low partial pressure of oxygen (PO₂) in tissues.
• Increased carbon dioxide (CO₂) levels leading to the Bohr effect.
• Higher acidity (lower pH), also contributing to the Bohr effect.
• Increased temperature in active tissues.

Question 4

What is a-vO2 diff?

Answer 4

Difference between the amount of O2 in the artery and vein reflects the amount of O2 that was delivered to the muscle

Question 5

Define Asthma

Answer 5

• Asthma: a disease characterized by spasms in the smooth muscles that line the respiratory system. An oversecretion of mucus and swelling of the cells lining the respiratory tract.

Question 6

COPD

Answer 6

• COPD (chronic obstructive pulmonary disease) is a general term that describes a family of diseases that lead to a dramatic reduction in airflow through the respiratory system