The following are not directly related to gas exchange in lung []
A. V/Q ratio
B. Respiratory membrane area
C. Respiratory membrane thickness
D. Gas partial pressure
E. Airway caliber
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Which of the following is not a component of the respiratory membrane []
Alveolar wall elastic fibers
B. Liquid layer containing lung surfactant
C. Alveolar epithelial layer
D. Capillary basement membrane
E. Capillary endothelial layer
The significance of lung stretch reflex is []
A. Increase lung ventilation
B. Decrease lung ventilation
C. Inhibit exhalation and excite inhalation
D. Stop inhalation and exhale happen
Excite inhalation and exhalation
The period of nerve fiber Na+ channel inactivation is []
Absolute refractory period
B. Relative refractory period
C. Supernormal period
D. Sub normal period
E. Normal period
Neuro-muscular junction transmission differs from synaptic transmission between neurons in that []
A. electrical transmission
B. bidirectional transmission
C. No time delay
D. fatigue
Excitation transmission is one-to-one
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