Which of the following substances belongs to the second messenger? ()
ATP
B. APP
C. cAMP
D. 5AMP
E. AMP
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Interactions between hormones do not include ()
A. Synergistic action
B. High efficiency
C. Antagonism
D. Permissive action
E. Competitive effect
The phenomenon that glucocorticoids can increase the sensitivity of myocardium and vascular smooth muscle to catecholamines is ()
A. Competitive role
B. Permissive action
C. Synergistic role
D. Positive feedback role
Efficient role
Excessive growth hormone secretion in early childhood will lead to ()
A. Simple goiter
B. Acromegaly
C. Mucinous edema
D. Toxic goiter
E. Gigantism
Which is not the characteristics of parasympathetic nervous system? ()
A. preganglionic fiber is short and postganglionic fiber is long
B. distribution is limited
C. tonic action
D. reaction is limited
E. having a stronger activity in rest condition
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