BIOL11300 Chapter Notes - Chapter 4: Supraesophageal Ganglion, Ecdysone, Hemimetabolism
18 Mar 2016
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Insect nerve cells are grouped into masses called ganglia. There is a gangly ant each body segment. Brain = protocerebrum: connected to compound eyes, visual stuff deutocerebrum: helps process and coordinate messages coming into protocerebrum tritocerebrum: sensory info from the rest of the body. Subesopogeal ganglion: controls mouthparts some insects can see ultraviolet range some can see polarized light insects process light images faster than humans the ability to detect chemicals is one of the most important senses. Chemoreceptors: detect chemicals mechanoreception: touch, appendage, and body positions, vibration, air movement , gravity, press differences. Johnston"s organ: mechanoreceptor that detects vibration and air movement. Arthropods have limited control over their internal temperature so the enviroment"s temperature has an impact on their growth. Metamorphosis: when arthropods bro and change in size. Functions of growth and development are controlled by hormones secreted by neuronsocrine cells. Stadium: the duration of the install period molting is triggered by hormones.
