Pulmonary Flashcards
What is the movement of ambient air into and out of the lungs?
Ventilation
What moves ambient air across lung into blood?
Diffusion
What is oxygen consumed and utilized by the body?
Oxygen Consumption
What is the amount of air inspired and expired in a normal breath?
Tidal Volume (TV)
What is the maximum amount of air inspired at the end of normal tidal volume expiration ( TV + IRV )
Inspiratory Capacity (IC)
What is the maximum amount of air expired following a maximal inspiration (IRV + TV + ERV)
Forced Vital Capacity (FVC)
What muscles contract at during “inhalation” at rest?
Diaphragm
What muscles contract during “inhalation” during exercise?
Diaphragm
External Intercostals
Scalenii
What muscles contract during “Exhalation” at rest?
None
What muscles contract during “Exhalation” during exercise?
Internal Intercostals
abdominals
What area of the brain is considered the “Control Center” for ventilation?
Medulla
What is shortness of breath or subject distress in breathing?
Dyspnea
What is the increase in pulmonary ventilation that exceeds the oxygen needs of metabolism?
Hyperventilation
What is the amount of air the subject breaths in and out in one minute?
Minute Ventilation VE
What is the mathematical formula for VE?
VE = RR x TV
What gases makes up normal ambient air?
Nitrogen
Oxygen 20.93%
Carbon Dioxide
What is the total pressure of ambient air on a normal day at sea level?
760mmHg
What are partial pressures?
= % Concentration x Barometric pressure
What happens to the partial pressure of oxygen PO2 as it moves from ambient air through the trachea and into the alveoli?
The air pressure in the trachea decreases, making it 713 mmHg and it is humidified/warmed, as it leaves into the alveoli the pressure is the same (713mmHg) but the gas concentrations change
What are the 4 main things that affect the Bohr Effect?
Decreased PO2
Increased Temperature
Increased PCO2
Decreased pH
What are two ways that Oxygen (O2) is transported in the blood?f
Physical solution
Combined with hemoglobin
What are three ways in which carbon dioxide (CO2) is transported in the blood?
Physical solution
As carbamino compounds
As bicarbonate