Respiratory T/F - A
The inflation (Hering-Breuer) reflex is a potentially dangerous response that may cause over inflation of the lung
False
The paired lungs are located in the mediastinum.
False
The average individual has 500 ml of residual volume in his lungs
False (1200 ml)
During normal quiet breathing, approximately 750 ml of air moves into and out of lungs with each breath.
False (500 ml)
Oxygenated hemoglobin releases oxygen more readily when the pH is more basic.
False (acidic)
The largest amount of carbon dioxide is transported in the bloodstream in the form of carbonic anhydrase.
False (bicarbonate)
Labored breathing is termed hypercapnia.
False (dyspnea)
In chronic bronchitis, mucus production is decreased and this leads to the inflammation and fibrosis of the mucosal lining of the bronchial tree.
False (increases)
The Hemlich maneuver is a procedure in which air in the lungs is used to expel a piece of food lodged in the esophagus.
False (trachea)
Atelectasis (lung collapse) renders the lung useless for ventilation.
True
Changes in arterial pH can modify respiration rate and rhythm even when carbon dioxide and oxygen levels are normal.
True
Dalton's Law of partial pressure states that the total pressure exerted by a mixture of gases is the sum of the pressure exerted independently by each gas in the mixture.
True
Intrapleural pressure is normally about 4 mm Hg less than the pressure in the alveoli.
True
Labored breathing is dyspnea.
True
Nasal conchae heat and moisten inhaled air, and reclaim heat and moisture during exhalation.
True
Smoking diminishes ciliary action and eventually destroys cilia.
True
Strong emotions and pain acting through the limbic system activate sympathetic centers in the hypothalamus, thus modulating respiratory rate and depth by sending signals to the respiratory centers.
True
The alveolar ventilation rate is the best index of effective ventilation.
True
The functions of the nasal conchae are to enhance the air turbulence in the cavity and to increase the mucosal surface area exposed to the air.
True
The lingual tonsil is found on the posterior surface of the root of the tongue.
True
The lungs are perfused by two circulations: the pulmonary and the bronchial. The pulmonary circulation is for oxygenation of blood. The bronchial circulation supplies blood to the lung structures (tissue).
True
The parietal pleura lines the thoracic wall.
True
Tracheal obstruction is life threatening.
True
Under certain conditions, the vocal chords act as a sphincter that prevents air passage.
True
Ventilation perfusion coupling means that more blood flows past functional alveoli than nonfunctional alveoli.
True
A drop in blood pH is likely to create a slower breathing rate.
False
As carbon dioxide enters systemic blood, it causes more oxygen to dissociate from hemoglobin (the Haldane Effect), which in turn allies more CO2 to combine with hemoglobin and more bicarbonate ions to be generated (the Bohr effect).
False
During normal quiet breathing, males breathe 25% more than females.
False
Increased temperature results in decreased O2 unloading from hemoglobin.
False
