Which of the following statements about dendritic spines is false?

Which of the following statements about dendritic spines is false?

Which of the following statements about dendritic spines is false?






  1. They enable localized, transient increases in calcium.
  2. They slow the diffusion of IP3, but do not prevent it from leaving the spine.
  3. They are the sites of excitatory synapses in various parts of the CNS.
  4. They have a bulbous head connected to a dendritic shaft by a narrow neck.
  5. They usually contain just three proteins: NMDA receptors, mGluR receptors, and CaM kinase II.


Answer: 5