The reason for rapid conduction of impulses along myelinated nerve fibers is that they have( )
A: long axons
B: thick axons
C: many synaptic vesicles in the axons
D: clefts of Schmidt and Lantermann
E: nodes of Ranvie
A: long axons
B: thick axons
C: many synaptic vesicles in the axons
D: clefts of Schmidt and Lantermann
E: nodes of Ranvie
举一反三
- Oligodendrocytes make myelin, a fatty substance that insulates nerve axons and speeds the conduction of impulses along nerve fibers.
- The axons and dendrites that are coated with a myelin sheath are called ( ). A: Neurite B: Nerve C: Nerve ending D: Nerve fiber
- In myelinated nerve fibers nerve impulses() A: occurs along the entire axolemma B: jump from node to node C: jump from internode to internode D: occurs along the Schwan cells E: occurs along the oligodendrocytes
- The submandibular ganglion contains preganglionic parasympathetic axons from which cranial nerve? A: oculomotor nerve B: trigeminal nerve C: facial nerve D: hypoglossal nerve E: vagus nerve
- Through which of the following structure does nerve fibers conduct nerve impulses? A: Myelin sheath B: Axolemma C: Neurofilament D: Synaptic vesicle