PSYCH 2NF3 Chapter Notes - Chapter 5: Renshaw Cell, Axon Terminal, Dendritic Spine
10 Mar 2014
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Document Summary
Channeled fluid from first to second container- not stimulated. Vagus nerve contains a chemical that tells the heart to slow its rate of beating another experiment with accelerator nerve. Epinephrine or adrenaline (ep) - speed up heart rate. In mammals, norepinephrine, replaces ep as the excitatory neurotrans in noradrenergic neurons. Ach= inhibitory by means of a receptor on organs of ans, mediating rest and digest behaviour. But excitatory on body muscles connected to sns. 3 main parts axon terminal (cid:0) presynaptic membrane (largely of protein molecules) 4 steps- summary: synthesis, either transmitter is created by dna or its building blocks are imported and stored in axon terminal. Some synthesized as proteins in cell body according to dna instructions. Packed into golgi bodied and transported on microtubules to axon terminal. Rna messenger may also be transported to synapse. Other synthesized in axon terminal from building blocks derived from food. Transporter proteins absorb these precursor chemicals from blood supply.
