ANA300Y1 Lecture Notes - Lecture 9: Membrane Potential, Axon Hillock, Extracellular Fluid
Document Summary
Sense: monitor internal & external environments , inputs . Integrate compare inputs from various sensory modalities in light of past experience (memory allows us to compare what we are experiencing now with past) prediction, decision making. Respond via control of voluntary (ex: striated, skeletal muscle) or involuntary muscle (ex: smooth and cardiac muscle, but they will respond to commands from nervous system) . Requires communication (nervous tissue all about communication) whereas epithelium was creating barriers and protection of body, connective tissue was support and holding things together. D. synaptic terminals : chemical transfer of information target cell type varies (other neurons, muscle cell, or gland ) Variations in neuronal structure a. multipolar neuron most common (many dendrites with a single axon, initial segment here, and axon varying length, short=interneuron, long = motor neuron maybe); eg. motor neurons, interneurons numerous dendrities, single axon.
