PSYC 1010 Chapter 3: Introduction to Psychology Chapter Three Notes

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: Myriam Mongrain

Document Summary

Psychology chapter 3 notes the biological bases of behaviour. If a(cid:374) a(cid:454)o(cid:374)"s (cid:373)(cid:455)eli(cid:374) sheath deteriorates, its sig(cid:374)als (cid:373)a(cid:455) (cid:374)ot (cid:271)e tra(cid:374)s(cid:373)itted effe(cid:272)ti(cid:448)el(cid:455). Impaired neural-glial communication may also contribute to psychological disorders, such as schizophrenia and mood disorders. However, a transmitter cannot bind to just any site: a transmitter has to fit into a receptor site for binding to occur. Hence, specific transmitters can deliver signals only at certain locations on cell membranes: acetylcholine, the discovery that cells communicated by releasing chemicals was first made in connection with transmitter acetylcholine (ach) Some chemicals bind to receptors but fail to produce psp. In effect, they temporarily block the action of the natural transmitter by occupying its receptor sites rendering them unusable. Two of these, gamma- aminobutyric acid (gaba) and glycine, are notable in that they seem to produce only inhibitory postsynaptic potentials: some transmitters, such as ach and ne, are versatile.