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10 Cards in this Set
- Front
- Back
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What are hormones?
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Chemical signals secreted by endocrine cells.
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What are circulating hormones?
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transported by blood; affect distant cells
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What are target cells?
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cells that have receptors for the hormones
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T/F
Hormones stimulate different responses in different cells |
True
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What are Paracrine hormones?
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affect only target cells near the site of release
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What are autocrine hormones?
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affect the cells that released the hormones
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Plants, sponges, and protists all use what?
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Chemical signals
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In arthropods, hormones control what?
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molting and metamorphosis
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Molting regulated by 2 hormones..what are they?
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Prothoracicotropic Hormone (PTTH): produced by ; stored in corpora cardiaca; stimulates prothoracic gland to produce ecdysone
Ecdysone: stimulates molting |
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Metamorphosis regulated by 1 hormone...what is it?
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Juvenile hormone: produced by corpora allata: high levels --> larva; low levels --> pupa
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