PSYCH261 Chapter 2: Biological Psychology 10th Edition Chapter 2
Document Summary
Local interneurons: form circuits with other neurons; analyze small pieces of info. Relay interneurons: connect circuits of local interneurons between brain regions. Structure and function of cells of the nervous system. Behaviour: function of nervous system; body: has cells specialized for detecting environmental events. ; eg. light, sound waves, odors, taste, touch. Interneurons: between sensory and motor; entirely within cns. Nervous system: 2 parts; cns (skull + spine) and pns (nerves + most sense organs) Neuron: nerve cell; inf-process & info-transmitting element of ns. 4 regions: i) cell body (soma); ii) dendrites; iii) axon; iv) terminal buttons. Soma: contains nucleus and machinery for life processes of cell. Dendrites ( trees"); receive message; take info from synapse and connecting terminal button. Axon: tube; partly covered with myelin sheath; carrier action potentional from axon end to t. b. Multipolar neuron: 1 axon and many dendrites; bipolar neuron: 1 axon and 1 dendrite (usu. sensory) > cns; usu. for touch, temp. changes, joints.