PSY290H5 Chapter Notes - Chapter 4: Metabotropic Receptor, Axon Terminal, Reuptake
Document Summary
Electrical signals are turned into chemical signals at synapses. Receptor proteins recognize transmitters and their mimics: neurotransmitters are picky to what they respond to, therefore the. Ion channels (changing shape to either open gated. Ionotropic receptors metaphor of fitting the right key into the lock occurs: however there are two general types of (cid:498)keys(cid:499) Instead, they link across the cell membrane to complicated chemical machinery inside the postsynaptic neuron. When activated, metabotropic receptors alter the inner workings of the postsynaptic cell, using chemicals called second messengers to cause nearby ion channels to open or close in order to have a change. Many neurotransmitters have been identified: basic principles for deciding whether or not a brain chemical qualifies as a classical neurotransmitter. It can be synthesized by presynaptic neurons and stored in axon terminals. It is released when action potentials reach the terminals. It is recognized by specific receptors located on the postsynaptic membrane.
