ZOO 2090 Lecture Notes - Lecture 19: Skeletal Muscle, Medulla Oblongata, Olfactory Bulb

• School: University of Guelph
• Department: Zoology
• Course: ZOO 2090
• Professor: Jinzhong Fu

Document Summary

Function: the nervous system (along with endocrine system) determines response of the body to changes in its environment. Types of cells: neurons: can be classified according to function (sensory, motor, interneuron) or morphology (unipolar, bipolar, multipolar, cell body (soma) usually bears dendrites receiving info and sends one or more axons transmitting impulses (action potentials) Types of cells: glia (neuroglia: 2 types of axon-ensheathing cells (oligodendrocytes and schwann cells), astrocytes mostly involved in structural and metabolic support, insulation and microglia part of the immune system. Synapse: an axon of one neuron with a dendrite or nerve cell body of another neuron, directional transmission of signal from one neuron to another (synaptic transmission) Central nervous system: brain: organ that coordinates all activities of the organism. Central nervous system: spinal cord: function: receive incoming impulses, integrate and coordinate them, transmit them wherever they should go within the cns, and send responses to the pns as appropriate, the establishment of simple (local) reflexes.