Physio Final Exam
Human Body
Human Body
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2. anatomic dead space
Dead space= part in lung that does not participate in gas exchange
3. partial pressure of O2 and CO2 in alveolar air equals - in arteries:
3. partial pressure of O2 and CO2 in alveolar air equals - in veins:
4. diffusion of oxygen and carbon dioxide is influenced by:
5. vital capacity is:
7. tidal volume during quiet breathing equals:
13. hypercapnia:
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
1. peripheral chemoreceptors
6. switch off neurons that shorten inspiration
8. total lung capacity equals:
4. Increase in CO2 concentration in blood will:
31. Anatomic dead space:
47. The form of hemoglobin that has carbon dioxide attached is called:
HbCO2
54. In the following reaction, what does A represent?CO2 + H2O <—-> H2CO3 <—> H+ + A
H2CO3 = carbonic acid
equation performed by carbonic anhydrase in the RBC
57. Diffusion of oxygen and carbon dioxide is influenced by:
5. Physiologic role of the pneumataxic centre comprise all functions listed below EXCEPT:
6. In patients with chronic respiratory failure (i.e. with a permanent hypercapnia= elevated CO2 levels) the most powerful stimulation of respiratory centre results from
The Bohr effect causes that the affinity of hemoglobin for oxygen decreases and occurs when
Parasympathetic stimulation of tissues in walls of bronchioles causes:
Obturation in airways causes that
Surfactant:
Which of the below mentioned statements is incorrect
The significant reduction in lung diffusion capacity is manifested by
Hering-Breuer reflex is triggered by
- If you treat a patient with bronchoconstriction using beta-agonist, a possible side effect which is:
70% of CO2 transported in body is in form of?
D. Bicarbonates in plasma
Most of Bicarbonates is formed in the:
Choose correct sentence:
9. Sudden decrease in atmospheric oxygen concentration will:
The symptom of overactivity of parasympathetic system is:
2) Pressure and volume of gas in a container are related to temperature and number of gas molecules. This is known as ________ law.
6) Alveolar ventilation refers to the
15) Which of the following features of the alveolar sacs allows for the ease of diffusion of gasses?
19) Dalton's law states that
22) In quiet breathing,
23) Boyle's law states that gas volume is
25) A typical value for intrapleural pressure is ________ mm Hg.
30) If a student inhales as deeply as possible and then blows the air out until he cannot exhale any more, the amount of air that he expelled is his
