Which substances are transported by simple diffusion? ()
A. N2
B. water
C. ethanol
D. urea
E. glycerol
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The characteristics of local potential are ()
A. not all or none
B. attenuated propagation
C. pulse generation
D. unattenuated propagation
E. summation
The right descriptions about angiotensin Ⅱ effects include ()
A. its direct effect is vasoconstriction
B. it can excite vasoconstrictor nerve
C. it can excite vasoconstrictor center
D. it can stimulate zona glomerulosa of the adrenal cortex to release aldosterone
E. it is activated by renin
The factors involved in cardiovascular activities are ()
A. angiotensin Ⅱ
B. epinephrine
C. norepinephrine
D. vasopressin
E. prostacyclin
The right descriptions about arterio-venous shunt of microcirculation are ()
A. in skin
B. thick wall
C. often opens when temperature increases
D. fast flow
E. regulating body temperature
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