Question

1. A patient with a restrictive lung disease would exhibit which of the following?

A. An increase in arterial p02

B. An increase in tidal volume

C. An increase in inspiratory reserve volume

D. A decrease in compliance

2. Blood vessels around poorly oxygenated alveoli______________.

A. Exhibit an increase loading reaction

B. Contract to divert blood to oxygenated alveoli

C. Dilate to increase perfusion of poorly oxygenated alveoli

3.Elveated body temperature, acidosis and/or anemia will________________________.

A. Decrease respiratory rate

B. Cause a left shirt in the oxygen-hemoglobin dissociation curve

C. Increase the unloading reaction

4. A pulmonary disorder that compromises the integrity of elastic protein fibers in the lungs may cause an increased compliance, poor elastic recoil and collpase of small bronchioles and alveoli. This patient would exhibit all of the following except:

A. A decrease in FEV1

B. Chest pain dur to air trapping

C. A decrease in vital capacity

D. An increase in % oxyhemoglin saturation

5. The majority of CO2 is transported in the blood as:

A. Dissolved in plasma

B. Carboxyhemoglobin

C. Carbaminohemoglobin

D. HCO3-

Answer 1

1. D) A decrease in lung compliance

Explanation: Restrictive lung disease are the diseases of the lung or the chst wall causing difficulty in the inflw of air into the lungs. This decrease the compliance of the lung tissue.

2.B. Contract to divert blood to oxygenated alveoli

Explanation: in the pulmonary arteries hypoxia inhibits potassium current and causes vasoconstriction. This diverts the blood towards the oxygen rich alveoli

3. C. Increase the unloading reaction

Explanation: Cause a right shir\ft in the oxygen-hemoglobin dissociation curve resulting in increase loading of the oxygen.

4. A. A decrease in FEV1

Explanation: Trapping of the air in the lungs with increased compliance is the feature of the obsturctive lung disease. This leads to decrease FEV1 with normal or increased FVC

5. A. Dissolved in the plasma

Explanation: 1) Carbon dioxide is more soluble in blood than oxygen. About 5 to 7 percent of all carbon dioxide is dissolved in the plasma.
2) filtration
3) the majority of carbon dioxide molecules near about 85% are carried as part of the bicarbonate buffer system. In this system, carbon dioxide diffuses into the red blood cells. Carbonic anhydrase (CA) within the red blood cells quickly converts the carbon dioxide into carbonic acid (H2CO3). Carbonic acid is an unstable intermediate molecule that immediately dissociates into bicarbonate ions
and hydrogen (H+) ions.
When the blood reaches the lungs, The H+ ion binds to the bicarbonate ion. This produces the carbonic acid intermediate, which is converted back into carbon dioxide through the enzymatic action of CA. The carbon dioxide produced is expelled through the lungs during exhalation