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14 Exakte Antworten 11 Text Antworten 426 Multiple Choice Antworten
Fenster schliessen

2. anatomic dead space

 

Dead space= part in lung that does not participate in gas exchange 

a. Is in low parts of airways

b. Equals 150 ml

c. Is in upper parts of airways

d. Answers b and c is correct

Fenster schliessen

3. partial pressure of O2 and CO2 in alveolar air equals - in arteries:

a. P O2 = 95 mmHg, P CO2 = 46 mmHg

b. P O2 = 100 mmHg, P CO2 = 46 mmHg

c. PO2 = 100 mmHg, PCO2 = 40 mmHg

d. P O2 = 95 mmHg, P CO2 = 40 mmHg

Fenster schliessen

3. partial pressure of O2 and CO2 in alveolar air equals - in veins:

a. P O2 = 95 mmHg, P CO2 = 46 mmHg

b. P O2 = 40 mmHg, P CO2 = 46 mmHg

c. PO2 = 100 mmHg, PCO2 = 40 mmHg

d. P O2 = 95 mmHg, P CO2 = 40 mmHg

Fenster schliessen

4. diffusion of oxygen and carbon dioxide is influenced by:

a. Partial pressure gradients

b. Diffusion distance

c. Surface area and membrane thickness

d. All answers are correct

Fenster schliessen

5. vital capacity is:

a. The amount of air included between maximum inhale and quiet exhale

b. The sum of the inspiratory reserve volume, expiratory reserve volume and tidal volume

c. The sum of expiratory reserve volume and residual volume

d. The sum of inspiratory reserve volume and residual volume

Fenster schliessen

7. tidal volume during quiet breathing equals:

a. 100 ml

b. 500 ml

c. 1200 ml

d. 1500 ml

Fenster schliessen

13. hypercapnia:

a. Intensifies ventilation

b. Reduces ventilation

c. Turns of respiratory center

d. Answer b and c is correct

Fenster schliessen

10. a chemosensitive are located in the medulla modulates respiration when the blood level of certain substances is not optional. The chemosensitive area responds to changes in the blood levels of which of the following substances?

--> CHOOSE CORRECT ANSWER:

Oxygen(O2)        Carbon Dioxide(CO2)        Hydorgen Ion (H+)

a. No                        yes                                     no

b. Yes                       yes                                     yes 

c. No                      yes                                   yes 

d. Yes                       yes                                      no 

 

c. respond to PCO2 and H+ 

Chemoreceptors in the medulla and carotid bodies respond to increased changs in PCO2 and little to H+ 

increased PCO2 = leads to increased ventilation