the cubozoans it is the medusoid form that is the dominant form and the hydroid

The cubozoans it is the medusoid form that is the

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the cubozoans, it is the medusoid form that is the dominant form and the hydroid form is reduced significantly earlier as compared to the other taxon present in the phylum Cnidaria. 3. What is glutathione? What is its role in digestion ? Once a prey item is captured and paralyzed by the tentacles, body fluids leaking from puncture wounds stimulate a simple feeding response in the hydra. This involves a shortening of the tentacles, expansion and opening of the mouth, and the engulfing of the victim. The major stimulant for this response is glutathione. Digestion of the prey item in the gastrovascular cavity proceeds over several hours. Glutathione is composed of 3 amino acids namely: Glycine, Glutamine, and Cysteine. It is an antioxidant and also protects the cell from free radicals and it detoxifies as well 4. What is meant by the term "cnidarian polymorphism"? The ability of cnidarians to take different forms is encapsulated in the term cnidarian polymorphism. Generally, there are two forms: the polyp, or the sessile form, and the medusa or the ‘jellyfish’ form. Polyps are immobile and they attach themselves on substrates while medusoids are mobile who freely swim in the environment. 5. How do you differentiate a hydrozoan medusoid from a scyphozoan medusoid? Hydrozoan medusoid has a velum making it a craspedote, while scyphozoan medusoid doesn’t have a velum, making it acraspedote. References: Pechenik, J.A. (2005). Biology of the Invertebrates, 5th Edition. New York: McGraw-Hill Companies, Inc.
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Engemann, R. & Hegner J. (1981). Invertebrate Zoology, 3rd Edition. New York: Macmillan Publishing Co. Inc.
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  • Spring '17
  • Samuel Go
  • Cnidaria, metagenesis, Hydrozoan medusoid

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