The basic center of the basic respiratory center is()
A. The spinal cord
B. The hypothalamus
C. The brain
D. The medulla oblongata
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Lack of O2 enhances respiratory activity, mainly by stimulating which of the following parts()
A. Carotid body and Aortic body
B. Carotid sinus and aortic arch
C. Spinal cord
D. Medulla oblongata
Male, 70 years old, because of the cold winter, then enter the bath center bathroom bath, soon after suddenly fainted, the reason is()
A. Systemic vasoconstriction
B. Cardiac output decreased
C. Increased blood vessel volume
D. Reduce blood
Male, 45 years old, normal calm breathing, tidal volume 500ml, respiratory rate 16 times/min, if the tidal volume is halved and respiratory rate doubled, what are the changes of pulmonary ventilation and alveolar ventilation respectively?()
A. Pulmonary ventilation remained unchanged and alveolar ventilation decreased
B. Pulmonary ventilation remained unchanged while alveolar ventilation increased
C. Both Pulmonary ventilation and alveolar ventilation increased
D. Both Pulmonary ventilation and alveolar ventilation decreased
The main reason that strenuous exercise reduces urine volume is()
A. Increased vasopressin secretion
B. Increased glomerular capillary blood pressure
C. Renal arterioles contracted and renal blood flow decreased
D. Increased glomerular filtration rate
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