Exercise Physiology - Respiration & Respiratory Response to Exercise

The volume of air flowing into the lungs from the external environment through either the nose or the mouth

Pulmonary ventilation

Gas exchange between lungs & blood

External respiration

Gas exchange at the cellular level

Internal respiration

Circulation that serves the external respiratory function

Pulmonary circulation

Circulation that supplies the internal respiration needs of the actual lung tissue; part of systemic circulation

Bronchiole circulation

Labored or difficult ventilation, sometimes due to high CO2 levels in the blood

Dyspnea

Increased pulmonary ventilation that exceeds metabolic requirements

Hyperventilation

P of a gas is inversely related to its volume under conditions of constant temperature; low P = large volume, high P = small volume

Boyles Law

Volume change per unit of pressure

Compliance

Amount of air moved in one breath

Tidal Volume

12-15 breaths/min, 2 seconds for inspiration, 3 seconds for exhalation; also called eupnea

Normal respiratory cycle at rest

Increase in arterial PCO2; causes increased ventilation

Hypercapnia

Decrease in arterial PCO2; causes decrease in ventilation

Hypocapnia

Increase pulmonary ventilation that matches an increased metabolic demand

Hyperpnea