Respiratory physiology definitions

Definition

Answer

amount of air moved in or out of the lungs per minute

volume of air that is inhaled but does not take part in the gas exchange, either because it remains in conducting airways or reaches alveoli that are not perfused/ poorly perfused.

volume of gas per unit time that reaches the alveoli. tidal volume-dead space.

hypothetical pressure of a particular gas if it alone occupied the volume of the mixture at constant temperature

lung volume representing normal volume of air displaced between normal inhalation and exhalation when extra effort is not applied.

maximum amount of air a person can expel from their lungs after maximum inhalation

volume of air present in the lungs at the end of passive expiration.

pressure within the pleural cavity

measure of the lung's ability to stretch and expand

Definition

Answer

surface-active lipoprotein complex formed by type II pneumocytes that reduces surface tension.

collapse or closure of a lung

opposition to flow caused by forces of friction in respiratory tract

a person's maximum speed of expiration

measure of the transfer of gas from air in the lung into erythrocytes in lung blood vessels

haemoglobin's affinity for oxygen is inversely related to both acidity and CO2 concentration

when the alveoli are perfused as normal, but ventilation fails to supply the perfused region

breakdown of lung tissue from inflammatory response to long-term exposure to irritants