The function of parathyroid hormone is to regulate
A. sodium
B. potassium
C. calcium
D. magnesium
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Glucose enters the red blood cell from the extracellular fluid()
A. Simple diffusion
B. facilitated diffusion
C. active transport
D. endocytosis
Tidal volume is 450 ml , respiration rate is 14/ min, then the ventilation volume is()
A. 3000ml
B. 3800ml
C. 4500ml
D. 5400ml
The primary force of lung ventilation is()
A. The pressure difference between alveolar gas and the atmosphere
B. Rhythmic contraction and relaxation of respiratory muscles
Changes in pulmonary pressure
D. Changes in intrathoracic pressure
Stroke volume can be decreased by()
A. Increasing ventricular contractility
B. Increasing heart rate
C. Increasing central venous pressure
Decreasing total peripheral resistance
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