The structure to balance the pressure difference between the middle ear and atmosphere is ()
A. cochlear duct
B. cochlear hole
C. round window
D. eustachian tube
E. oval window
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Adequate stimulus in the semicircular canal is ()
A. angular acceleration
B. linear uniform speed motion
C. rotary uniform speed motion
D. linear deceleration
E. linear acceleration
When a constant intensity of stimulus persists, AP frequencies of afferent nerve decreased with the time, known as ()
A. fatigue;
B. inhibition
C. adaptation
D. block
E. attenuated propagation
Regulating capacity of eye is mainly determined by the ()
A. corneal elasticity
B. lens elasticity
C. vitreous elasticity
D. pupil diameter
E. refraction index of aqueous humor
The reason that the myocardial cell does not produce the complete tetanus is___. ()
A. that it is controlled autorhythmicity
B. that its effective refractory period is very long
C. due to its "all or none" contraction
D. due to its atrioventricular delay
E. due to its little reserve of calcium in its sarcoplasmic reticulum
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