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Related Flashcards
Cards In This Set
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What are the functions of a nematocyst? (3)
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Prey capture, defense, attachment to a substrate
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What is an operculum?
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The cover of a cnidocyte; it opens with a change in osmotic pressure
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What is a cnidocil?
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The "trigger" of a cnidocyte. it is tripped by mechanical or chemical stimulus.
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What are the three general types of cnidocytes?
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Penetrant, glutinant, volvent
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What is a penetrant cnidocyte?
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A hollow fillament with barbs to infect toxins upon penetration
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What is a glutinant cnidocyte?
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Filament has "glue" on it to attach to prey
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What is a volvent cnidocyte?
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When the filament recoils around the target and brings it to the predator
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What are the 5 types of cells in the epidermal tissue of a cnidarian?
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Cnidocytes; epitheliomuscular cells; interstitial cells; glandular cells; neurosensory cellss
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What are the 5 types of cells in the gastrodermal tissue of a cnidarian?
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Cnidocytes; nutritive-muscular cells; interstitial cells; glandular cells; sensory cells
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What is unique to gland cells in the epidermial tissue?
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Are around the pedal disk and secrete mucus for attachment and prey
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What is unique to the gland cells in the gastrodermal tissue?
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Secrete digestive enzymes
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Do cnidarians have a CNS?
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No
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What is the orgin of basic synapse and neuromuscular junction?
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Nerve cells between the epitheliomuscular cells
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What produces a flexible skeletal support system?
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Mesoglea
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What is dimorphism?
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Having 2 body structures within one life cycle (polyp and medusa)
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