Events of Respiration
The phase of respiration where air enters the lungs due to negative alveolar pressure.
What is Inspiration?
The primary dome-shaped muscle of inspiration separating the thoracic and abdominal cavities.
What is the Diaphragm?
Intercostal muscles that elevate the ribs during inhalation.
What are External Intercostals?
The primary power source for human speech production.
What is the Respiratory System?
The volume of air inhaled and exhaled during a normal, quiet breathing cycle.
What is Tidal Volume (TV)?
During inhalation, the lungs expand and cause this pressure to fall below atmospheric pressure, which creates the gradient that draws air into the lungs.
What is Alveolar Pressure?
Microscopic air-filled structures located at the end of the pulmonary airways are the main sites for oxygen and carbon dioxide exchange.
What are the Alveoli?
A passive pressure that varies with lung volume. It is positive above the respiratory system's resting level and negative below it.
What is Relaxation Pressure?
This volume measures the maximum amount of additional air that can be inspired after reaching the end of a normal tidal inspiration.
What is Inspiratory Reserve Volume (IRV)?
Two membranes that create a link between the lungs and chest wall, which allows them to move collectively during breathing.
What are the Visceral and Parietal Pleurae?
This capacity's formula consists of: IRV + TV + ERV and represents the maximum volume of air that can be exhaled following a maximum inspiration.
What is Vital Capacity (VC)?
After a patient performs a tidal expiration, the lungs still contain ERV + RV. Together, the two volumes make up this capacity.
What is Functional Residual Capacity (FRC)?
An individual's chest wall expands during a resting breath, which causes lung volume to increase and alveolar pressure to fall below atmospheric pressure. According to the pressure gradient, this is the resulting movement of air.
What is Airflow into the Pulmonary Apparatus?
A patient is instructed to forcefully exhale. In order to help decrease thoracic volume, these muscles contract, compress the abdominal contents, and pushes the diaphragm upward.
What are the Abdominal Wall Muscles?
During a pulmonary test, a clinician wants to determine the total amount of air in the patient's lungs after a maximum inspiration. The measurement includes residual volume so it cannot be measured by simple spirometry.
What is Total Lung Capacity (TLC)?