Which are correct in the following descriptions about the properties of action potential? ()
A. all or none
B. several action potentials can be summation
C. several action potentials can not be summation
D. The conduction velocity of action potential in a myelinated nerve fiber is faster than in unmyelinated nerve fiber
E. The amplitude of the action potential decreases with the increase of the conduction distance
查看答案
Passive transport includes ()
A. simple diffusion
B. facilitated diffusion
C. active transport
D. endocytosis
E. exocytosis
Which one of the following nerves connected with medulla oblongata? ()
A. abducent nerve
B. facial nerve
C. optic nerve
D. vagus nerve
E. trochlear nerve
Which one of the following branches is not the branches of the spinal nerve? ()
A. anterior branch
B. posterior branches
C. meningeal branch
D. communicating branch
E. tympanic branch
The inferior salivatory nucleus (in the brain stem) sends the fibers into the ()
A. trigeminal nerve
B. facial nerve
C. glossopharyngeal nerve
D. vagus nerve
E. occulomotor nerve
微信支付 
支付宝支付