The enzyme that eliminates acetylcholine in the transmission of neuromuscular junction is []
A. Phosphodiesterase
B. Adenylate cyclase
C. ATPase
D. Cholinesterase
E. Carbonic anhydrase
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The structural basis of direct electrical synaptic transmission between adjacent cells is []
A. Gap connection
B. Tight connection
C. Synapse connection
D. End plate connection
E. Connector connection
During tonic contraction, the action potential of muscle cells []
A. Increase the amplitude
B. Decrease the amplitude
C. the amplitude sometimes big and sometimes small
Decrease the frequency
E. No overlap
O2 and CO2 enter and exit the cell membrane in the body through []
A. Simple diffusion
B. Facilitated diffusion
C. Active transport
D. endocytosis
E. exocytosis
The way that large protein enters the cell membrane is []
A. Simple diffusion
B. Facilitated diffusion
C. Active transport
D. endocytosis
E. exocytosis
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