The process that CO2 enter the cell is ()
A. simple diffusion
B. facilitated diffusion
C. active transport
D. endocytosis
E. exocytosis
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The important latent pacemaker in the heart is ()
A. SA node
B. the atria
C. A-V node
D. the Purkinje fiber
E. the ventricle
Which of the following statements regarding the depressor reflex is false? ()
A. It is also called the sino-aortic baroreceptor reflex
B. It is a negative feedback regulation
C. It is more sensitive to the fluctuant blood pressure
D. When the arterial pressure rises abruptly, the activity of this reflex enhances
E. It has no effect in rest condition
Glomerular filtration rate means ()
A. The volume of glomerular filtrate formed by one kidney per minute
B. The volume of glomerular filtrate formed by two kidneys per minute
C. The plasma volume passed through two kidneys per minute
D. The volume of urine formed by one kidney per minute
E. The volume of urine formed by two kidneys per minute
The reabsorption of glucose in the proximal tubules is accompanied with ()
A. the reabsorption of Na+
B. the reabsorption of K+
C. the reabsorption of Cl-
D. the reabsorption of Ca2+
E. the reabsorption of I-
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