Exam 4 Flashcards
Hair and Turbinates
shell-shaped structures in nose and cilia in the upper and lower airways
Trap and remove foreign particles from the air
Mucosal lining
Upper and lower airways
Warms and humidifies air
Irritant receptors
Trigger a sneeze or cough reflex to remove foreign particles
Immune protections
Immune coating in the respiratory tract mucosa macrophages in the alveoli
Ventilation
The movement of air between the atmosphere are the respiratory portion of the lungs
Perfusion
The flow of blood through the lungs
Diffusion
The transfer of gases between the air-filled spaces in the lungs and the blood
Inspiration
Air is drawn into the lungs as the respiratory muscles expand the chest cavity
Expiration
Air moves out of the lungs as the chest muscles recoil and the chest cavity becomes smaller
Respiratory Control: Centers in the brain
Brainstem (neurons in pons and medulla)
Respiratory Control: Lung receptors
Located in the epithelium and smoot muscles of airways near alveolar-capillary junctions
Respiratory Control: Chemoreceptors
Critical sensors for alterations in blood chemistry (detects oxygen, carbon dioxide, and acid-base status)
Lung Capacity: Tidal Volume (TV)
Aprox. 500 mL at rest
Amount of air that moves into and out of the lungs during a normal breath
Lung Capacity: Inspiratory reserve volume (IRV)
Aprox. 3000 mL at rest
The amount of air that can be inhaled after a normal breath
Lung Capacity: Expiratory reserve volume (ERV)
Aprox. 1100 mL at rest
The amount of air that can be exhaled after a normal breath
Lung Capacity: Vital Capacity (VC)
Aprox. 4600 mL at rest
Equals the IRV plus the TV plus the ERV
The maximum amount of air that can be moved in and out of the lungs with forced inhalation and exhalation
Lung Capacity: Forced vital capacity (FVC)
The maximum amount of air that is exhaled from the lungs during a forced exhalation
Lung Capacity: Forced expiratory volume in 1 second (FEV1)
Max amount of air that can expire from the lungs in 1 second
Lung Capacity: Residual Volume (RV)
The air that remains in the lungs after forced respiration
Lung Capacity: Total lung capacity (TLC)
The total amount of air in the lungs when they are maximally expanded and is the sum of the VC and RV
Description of Pattern: Eupnea
The expected pattern of breathing is characterized by a rate between 10 and 20 breaths/min in adults, 500 and 800 mL in-depth, and a regular rhythm
Description of Pattern: Tachypnea
Rapid shallow breathing characterized by a rate of breathing above 24 breaths/min in adults
Description of Pattern: Apnea
Cessation of breathing for 10 seconds longer usually interspersed with another breathing
Description of Pattern: Hyperpnea
Increase in the rate and depth of breathing. Hyperpnea is responsive to PaO2/PaCO2 requirements; hyperventilation occurs in excess of what is needed to maintain PaCO2