BSNC 1000 - GAS EXCHANGE UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Gas exchange - CORRECT ANSWER - the process by which oxygen is transported to
cells and carbon dioxide is transported from cells
Hypoxia - CORRECT ANSWER - Insufficient oxygen reaching cells
Anoxia - CORRECT ANSWER - Total lack of oxygen in body tissues
Hypoxemia - CORRECT ANSWER - reduced oxygenation of arterial blood
Scope of gas exchange - CORRECT ANSWER - Optimal to impaired gas exchange
Chemoreceptors - CORRECT ANSWER - Senses carbon dioxide levels and transmits
impulses to the diaphragm and intercostal muscles to contract
type 1 alveolar cells - CORRECT ANSWER - Produces surfactant
Surfactant - CORRECT ANSWER - A lipoprotein that coats the inner surface of alveoli to
keep them open
Erythrocytes - CORRECT ANSWER - red blood cells
What component of erythrocytes transports oxygen? - CORRECT ANSWER -
Hemoglobin
, Mechanism of inhalation - CORRECT ANSWER - The diaphragm and external intercostal
muscles contracts and increase thoracic volume
Mechanism of exhalation - CORRECT ANSWER - The diaphragm and external intercostal
muscles relax and the chest cage returns to neutral position
Pulmonary ventilation - CORRECT ANSWER - The act of moving air in and out
(Inspiration and exhalation)
Tidal volume - CORRECT ANSWER - Volume of air inhaled or exhaled in one breath
Vital capacity - CORRECT ANSWER - The total volume of air that can be exhaled after
maximal inhalation.
Forced Expiratory Volume (FEV) - CORRECT ANSWER - % of vital capacity
exhaled/time
In a healthy adult, 75-85% in one second
What does diffusion depend on? - CORRECT ANSWER - Permeability, surface area,
concentration gradient for the gas
What are the two diseases that make up COPD? - CORRECT ANSWER - chronic
bronchitis and emphysema
What are some complications of COPD? - CORRECT ANSWER - - Unable to maintain
normal blood gases by increasing their breathing effort
- Imbalance between ventilation and perfusion
- Right sided heart failure with peripheral edema
- Frequent respiratory infections
ACTUAL Exam Questions and CORRECT
Answers
Gas exchange - CORRECT ANSWER - the process by which oxygen is transported to
cells and carbon dioxide is transported from cells
Hypoxia - CORRECT ANSWER - Insufficient oxygen reaching cells
Anoxia - CORRECT ANSWER - Total lack of oxygen in body tissues
Hypoxemia - CORRECT ANSWER - reduced oxygenation of arterial blood
Scope of gas exchange - CORRECT ANSWER - Optimal to impaired gas exchange
Chemoreceptors - CORRECT ANSWER - Senses carbon dioxide levels and transmits
impulses to the diaphragm and intercostal muscles to contract
type 1 alveolar cells - CORRECT ANSWER - Produces surfactant
Surfactant - CORRECT ANSWER - A lipoprotein that coats the inner surface of alveoli to
keep them open
Erythrocytes - CORRECT ANSWER - red blood cells
What component of erythrocytes transports oxygen? - CORRECT ANSWER -
Hemoglobin
, Mechanism of inhalation - CORRECT ANSWER - The diaphragm and external intercostal
muscles contracts and increase thoracic volume
Mechanism of exhalation - CORRECT ANSWER - The diaphragm and external intercostal
muscles relax and the chest cage returns to neutral position
Pulmonary ventilation - CORRECT ANSWER - The act of moving air in and out
(Inspiration and exhalation)
Tidal volume - CORRECT ANSWER - Volume of air inhaled or exhaled in one breath
Vital capacity - CORRECT ANSWER - The total volume of air that can be exhaled after
maximal inhalation.
Forced Expiratory Volume (FEV) - CORRECT ANSWER - % of vital capacity
exhaled/time
In a healthy adult, 75-85% in one second
What does diffusion depend on? - CORRECT ANSWER - Permeability, surface area,
concentration gradient for the gas
What are the two diseases that make up COPD? - CORRECT ANSWER - chronic
bronchitis and emphysema
What are some complications of COPD? - CORRECT ANSWER - - Unable to maintain
normal blood gases by increasing their breathing effort
- Imbalance between ventilation and perfusion
- Right sided heart failure with peripheral edema
- Frequent respiratory infections
