BIOL 1107 Chapter Notes - Chapter 43.1-43.2: Central Nervous System, Ctenophora, Active Transport

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27 Nov 2016
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Neurons are individual nerve cells and are mainly responsible for the working of the brain and the rest of the nervous system. They conduct information in the form of electrical signals that are sent from one point in the body to other points at very high speeds. Muscles can respond to signals being sent from neurons by contracting. Cephalization is the phenomenon in which the evolution of a bilaterally symmetric body with structures for information gathering and processing located at the head end. Most animals that have a cns have a large cerebral ganglion located in their anterior end (brain). One function of the cns is to integrate information from sensory neurons. Cells called interneurons pass signals from one neuron to another. Interneurons make connections with motor neurons which are nerve cells that send signals to effector cells in glands or muscles. Motor and sensory neurons are bundled together into long strands of nervous tissue called nerves.

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