Which statement about the mechanisms underlying hippocampal LTP induction is false?
- An influx of calcium triggers two or more intracellular processes in the postsynaptic dendritic spine.
- Calcium may trigger the release of a retrograde messenger that enhances transmitter release from the presynaptic terminal.
- Calcium may activate CaM kinase II in such a way that it switches to a long-term "on" state.
- Calcium may activate a signaling cascade that causes the insertion of glutamate receptors into the postsynaptic membrane.
- Calcium decreases a resting leak current of sodium so that the postsynaptic cell is closer to threshold and therefore fires more easily.
Answer: 5