thoracotropic hormone

thoracotropic hormone

also called  ecdysiotropic hormone,  or  prothoracotropin,  

      neurohormone secreted in arthropods. After being released by neurosecretory cells of the brain, the thoracotropic hormone is carried by the blood to the prothoracic glands, where it stimulates the release of ecdysone in insects or crustecdysone in crustaceans, steroid hormones that initiate molting (the periodic shedding of the outer skeleton). See also juvenile hormone. (juvenile hormone)

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Universalium. 2010.

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Look at other dictionaries:

  • hormone — hormonal, hormonic /hawr mon ik, moh nik/, adj. /hawr mohn/, n. 1. Biochem. any of various internally secreted compounds, as insulin or thyroxine, formed in endocrine glands, that affect the functions of specifically receptive organs or tissues… …   Universalium

  • juvenile hormone — Biochem. any of a class of insect and plant hormones acting to inhibit the molting of a juvenile insect into its adult form. [1935 40] * * * ▪ biochemistry also called  Neotenin,         a hormone in insects, secreted by glands near the brain,… …   Universalium

  • nervous system — Anat., Zool. 1. the system of nerves and nerve centers in an animal or human, including the brain, spinal cord, nerves, and ganglia. 2. a particular part of this system. Cf. autonomic nervous system, central nervous system, peripheral nervous… …   Universalium

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