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11 Cards in this Set
- Front
- Back
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1. What is the diversity and types of “life styles” in the Playthelminthes?
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20,000
free-living parasitic |
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2. What types of movement do the flatworms exhibit and what are the tissues/mechanisms responsible for that movement?
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circular, longitudinal muscles, swimming, ciliary gliding (epidermis covered in cilia/mucus)
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3. What constrains size in flatworms?
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most have no gut
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4. What mechanisms do they employ for circulation and gas exchange?
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diffusion
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5. What type of gut do flatworms have and why is this a design constraint?
a. What about parasitic lineages? |
no gut or blind gut
absorb food |
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6. Why are we so jazzed about protonephridia?
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first place excretion is seen in Animalia!!! Used on osmoregulation, excretion of NH3
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7. What advances do we see in the nervous system of flatworms and what are some of the receptor types and their function?
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Primitive: nerve network w/ minor cephalization
Advanced: cerebral ganglion Photoreceptors: eyes, light detecting, negatively phototactic (dislike light) Schemoreceptors: tasters Tactilereceptors: feelers, thigmotactic (orienting twrd touch) |
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8. For the Turbellarian class of flatworm:
a. Specifics of lifestyle b. What is up with the body covering and why? |
1. Turbellaria:
a) free-living, aquatic/terr., predator/scavenger b) cellular ciliated epidermis |
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8. For the Monogenea class of flatworm:
a. Specifics of lifestyle b. What is up with the body covering and why? c. For parasites, where do they latch on and how? |
2. Monogenea:
a) ecto-parasitic, monogenetic flukes b) tegument-protective, facilitates exchange w/ environment c) hooked prohaptor/opisthaptor for attachment |
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8. For the Trematoda class of flatworm:
a. Specifics of lifestyle b. What is up with the body covering and why? c. For parasites, where do they latch on and how? d. Understand life cycles for the ones covered in lecture. |
3. Trematoda:
a) digentic flukes, endo-parasitic b) tegument c) suckers (lacks haptors) d) eggs --> free swimming --> penetrates body |
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8. For the Cestoda (Tapeworms) class of flatworm:
a. Specifics of lifestyle b. What is up with the body covering and why? c. For parasites, where do they latch on and how? |
4. Cestoda: “Tapeworms”
a) entoparasites b) tegument, lack digestive tract, control pH by secreting a protein c) 2 hosts |
