Dendritic spines:

Dendritic spines:

Dendritic spines:





  1. were discovered with the invention of electron microscopy in the 1950s.
  2. serve as "electrical compartments" to ensure localized depolarization.
  3. serve as "chemical compartments" to concentrate biochemical mechanisms.
  4. collectively form a set of hard-wired permanent neural connections.
  5. are the sites of all excitatory and inhibitory synaptic transmission in the mammalian CNS.

Answer: 3