BIOLOGY 152 Chapter Notes - Chapter 35: Neuron, Homeostasis, Nerve Net
2 Feb 2017
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Summarized and organized from how life works, 7th edition. How life works chapter 35 animal nervous system. Except sponges, all multicellular animals possess a nervous system, a network of many interconnected nerve cells. Animal nervous systems have three types of nerve cell. Sensory neurons: receive and transmit information about an animal"s environment or its internal physiological state. Interneurons: process the information received by sensory neurons and transmit it to different body regions, communicating with motor neurons at the end of the pathway to produce suitable responses. Nervous system function is fundamental to homeostasis: the ability of animals, organs, and cells to actively regulate and maintain a stable internal state. Brain: process complex sensory stimuli received from environment or anywhere of body. Sessile, immobile, animals like sea anemones or clams: simple sense organs and nervous system. Active animals as arthropods (include insects, spiders, and crustaceans), squid, and vertebrates: sophisticated sense organs linked to a brain and more complex nervous system.
