Respiratory System

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Respiratory System
2015-04-29 10:03:12
physiology lf2

FML -_-
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  1. If the decrease of interpleural pressure by 5 cm H2O results in the increase of lung volume by 1 l the lungcompliance is:
    a. Related to P/V
    b. Related to V/P
    c. 5 cm H2O/l
    d. 0.20 l/cm H2O
  2. Increase of CO2 content in the blood results in:
    a. Decrease of blood pH
    b. Increase of lung ventilation
    c. Carotid bodies activation
    d. Does not stimulate erythropoesis
  3. Lung volume:
    a. Cannot be larger then vital capacity
    b. Increases usually with the increase of lung ventilation
    c. Increases because of the decrease of inspiratory reserve capacity
    d. Increases because of the decrease if exspiratory reserve capacity
  4. The damage of vagus nerves results in:
    a. Increase of rate of breathing
    b. Decrease of rate of breathing
    c. Rate of breathing is not affectedRespiratory failure
    d. The respiration is no more effected by blood gases concentration
  5. The shunt of 10% of blood from right heart ventricle to the left heart results in:
    a. Increase of PO2 gradient between the alveolar air and arterial blood
    b. Great change of Hb saturation and small change of PO2
    c. Increase of the V/Q ratio in the lungs
    d. Marcant hypercapnia
    e. Pulmonary hypertension
  6. Because of the pattern of O2 dissociation curve of Hb:
    a. Transport of O2 from the lung to the pulmonary capillaries is at alveolar PO2 higher then 70 torr affected by alveolar PO2 only in small extent
    b. The lung transport of CO2 inhibits partly the transport of O2 in the lungs
    c. Alveolar PO2 is higher than 200 torr
    d. Maximum of O2 is transportend when alveolar PO2 changes from 120 torr to 70 torr
  7. Alveolar pressure is:
    a. Subatmospheric at the end of inspirium
    b. Related to the lung resistance and direction of air flow
    c. Subatmospheric during exspirium due to the lung compliance
    d. Is related to the functional residual lung capacity only
  8. Lung surfactant is:
    a. Solvent related to the soap used for the treatment of states with the high lung compliance
    b. Prevents the areation of lungs in fetus
    c. Decreases the lung compliance mainly in alveoli with low volume
    d. Causes high work of breathing
    e. Restricts the diffusion properties in the lungs
  9. Generalized hypoventilation results in:
    a. Arterial hypercapnia
    b. Stimulation of carotid bodies by hypoxia
    c. Decrease of alveolar PO2 because of stimulation of breathing
    d. Compensatory increase of lung blood flow
  10. Cutting of the carotic sinus nerves and vagal afferents to aortic arch results in:
    a. Decrease of arterial blood pressure in recumbent position
    b. Loss of ability to regulate arterial pressure in the change from recumbent to upright position
    c. Decrease of brain blood flow
    d. Cardiac failure
    e. Increase of heart conductivity of impulses
  11. Alveolocapillary diffusion of CO2 is 20 times higher than diffusion of CO2 because:
    a. CO2 is actively transported
    b. Surface area accessible for CO2 is larger
    c. CO2 is more soluble in water than O2
    d. Pressure gradient of CO2 is bigger than for O2
    e. Content of CO2 in athmospheric air is smaller than content of O2
  12. The most effective stimulus of ventilation is:
    a. PCO2 in inspired air is doubled
    b. PO2 in inspired air is doubled
    c. PCO2 in inspired air is reduced by 50%
    d. PO2 in inspired air is reduced by 50%
    e. A and D are equipotent stimuli
  13. The increase of ventilation in mild exercise is not resulted from:
    a. Increase of body temperature
    b. Joints movement
    c. Decrease of blood pH
    d. Increase of blood PCO2
    e. Increase of blood pH
  14. In the respiratory alkalosis:
    a. PCO2 increases
    b. PCO2 decreases
    c. PCO2 is not changed
    d. Kidney the reabsorption of sodium is decreased
    e. Ventilation of lungs is decreased
  15. Destruction of pneumotaxic center in the pons results in:
    aApneustic breathing
    b. Vigorous breathing
    c. Increase of the rate of breathing
    d. Apnoe
    e. Respiratory arrest
  16. Lung surfactant:
    a. Decreases the lung surface tension
    b. Enlarges alveoli
    c. Is more concentrated in exspirium
    d. Is better distributed in exspirium
  17. Nonventilated part of the lungs results in.
    a. A-V shunt
    b. Increase of PCO2 in alveolar air
    c. Decrease of PO2 in alveolar air
    d. Increase of the dead space