Zoology Unit #4

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kayla4148
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138086
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Zoology Unit #4
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2012-03-02 13:26:03
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Phylum Mollusca
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chapter 16
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  1. What are the three classes of Phylum Mollusca?
    • Gastropoda
    • Pelecypoda
    • Cephalopoda
  2. Which class in phylum mollusca means stomach foot?
    Gastropoda
  3. What are the examples of the class gastropoda?
    Whelk, Conch, Abalone
  4. Which class in phylum mollusa means hatchet foot?
    Pelecypoda
  5. What are the examples in class pelecypoda?
    Mussles, shipworm, scallop, oysters
  6. Which class in phylum mollusa that means head-foot?
    Cephalopoda
  7. What are the examples of class cephalopoda?
    Octupus, Nautilus, Cuttlefish, Squid
  8. What are the key evolutionary advances of phylum Mollusca?
    Eupuesocoel, and all major systems
  9. What is the main habitat of phylum mollsca?
    Mainly aquatic and some land
  10. What are the body regions of phylum mollusca?
    Head, Foot, Visceral Mass
  11. What variety of feeding methods are used in phylum mollusca?
    Carnivores, herbonivores, saprotroph, filter feeders, parasites
  12. Do they have an open or closed circulatory system?
    Open, besides Cephalopoda
  13. How does gas exchange take place in phylum mollusca?
    Across the body along with lungs or gills
  14. What does the head/foot contain?
    feeding, cephalic sensory and locomotor organs.
  15. What does the visceral mass contain?
    the digestive, circulatory, resporatory, and reproductive organs.
  16. What is the rasping tongue like organ (not found in bivalves) A ribbon membrane covered with rows of tiny backwards-pointing teeth. Serves to scrape off food and provides a "conveyer belt" transport food toward the disgestive tract?
    Radula
  17. What are the foot functions?
    Movement, feeding (to capture prey) attachment reproduction.
  18. Where does most of the respiration take place at in Class Gastropoda?
    through the mantle tissue or through the lungs or gills that have developed within the cavity itself
  19. What is the body plan of Class Gastropoda?
    Univalve
  20. What has a single shell and it is their chief form of defense?
    Univalve
  21. What is the harden mucous plug that prevents water lost
    Operculum
  22. What is torison?
    Twisting of the body organs in a 180 degrees direction
  23. What is the problem with torison create for the gastropoda and how is it solved.
    No more fouling by the water current the wastes are carried away from the gills
  24. What happens before torison takes place?
    Coiling
  25. What is right handed coiling called
    Dextral
  26. What is left handed coiling called?
    Sinistral
  27. Is their ganglia well developed?
    YES
  28. What are the sensory organs in Class Gastropoda?
    • Eyes at the base of each tentacle or simple photoreceptors (light and Dark)
    • Staticysts
    • tractile organs
    • chemoreceptors
  29. what do statocysts help with?
    gravity
  30. what do tactile organs help with ?
    touch
  31. What do chemoreceptors help with
    taste and smell
  32. What is the movement like in gastropoda's?
    propelled by muscular perstalsis of foot and mucous secreated by gland cells
  33. What helps filtering out wastes from bodily fluids and excreting them via pores?
    nephridia
  34. Are Gastropoda's deiocous or monoecious?
    Deiocous usually, sex structures are on the head.
  35. What is a love dart in Gastropoda's?
    Harden chiten grows with hormones and they stap partner in brain telling it to fertize the eggs. Other snail leaves and kills sperm.
  36. What class involves the hatchet food nickname
    Class Pelecypoda
  37. What is another name for class pelecypoda?
    bivalves
  38. What is a notch between the anterior and dorsal sides that is the oldest part of the shell.
    Umbo
  39. How do pearls form?
    They form when a piece of sand gets into the mantle and then the mantle cavity starts to bulid around it
  40. What removes unwanted particles in the gills?
    Gill Palps
  41. How are the proteins and fats digested in class pelecypoda?
    Interacellular
  42. How are carbs digested in class pelecypoda?
    extracellular
  43. What is the crystalline style do in the digestive system?
    • seperates proteins and fats from carbs.
    • rolling the food mass and freeing digestive enzymes
  44. What type of circulatory system do the class pelecypoda have?
    Open, three chambered heart. (2 auricles and 1 ventricle)
  45. What is the pattern of the blood flow in Class Pelecypoda?
    Heart--arteries--Capillaries to sinus--veins (gills)
  46. What sensory organs do class pelecypoda have?
    • Statocysts in the foot
    • tactile cells
    • pigment cells
    • scallops have blue eyes
  47. How is sperm shed into the water by Class Pelecypoda?
    Incurrent siphon
  48. What happens to the zygote development within the gills?
    glochidia
  49. What needs to happen after glochidia are expelled into the water?
    must find fish to parasitize
  50. Which class of mollucs mean head footed mollusks?
    Cephalopoda
  51. What is the habitat of the class cephalopoda?
    Marine, most prefer deep water
  52. What functions do the suckers serve in class cephalopoda?
    On the arms/tenticles are good for catching food
  53. What are the foot functions?
    Movement, feeding (to capture prey) attachment reproduction
  54. What is the body plan class gastropoda?
    though the mantle tissue or through the lungs or gills that have developed within the cavity itself
  55. What is the body plan of clss gastrpoda ?
    univalve
  56. What has a single shell and it is their chief form of defense?
    univalve
  57. What is the harden mucous plug that prevents water lost?
    operculum
  58. What is torison?
    twisting of the body organs in a 180 degrees direction
  59. What is the problem with torison create for the gastrpoda and how it is solved
    No more fouling by the water current the wastes are carried away from the gills
  60. What happens before torison takes place?
    Coiling
  61. What is right handed coiling called?
    Dextral
  62. What is left handed coiling
    Sinstral
  63. Is their ganglia well developed?
    yes
  64. What are teh sensory organs in class gastropoda?
    • Eyes at the base of each tentacle or simple photoreceptors (light and dark)
    • staticysts
    • tractile organs
    • chemoreceptors
  65. What do statocysts help with?
    Gravity
  66. What do tactile organs help with?
    touch
  67. what do chemorecptors help with?
    taste and smell
  68. What is the movement like in gastropoda's?
    Propelled by muscular perstalsis of foot and mucous secreated by gland cells
  69. What helps filtering out wastes from bodily fluids and excreting them via pores?
    Nephridia
  70. Are gastropoda's deiocuous or monoecious?
    Deiocous usually, sex structures are on the head
  71. what us a love dart in gastropodas?
    Harden chiten grows with hormones and they stap partner in brain telling it to fertize the eggs. other snial leaves and kills sperm
  72. What class involves the hatchet food nickname?
    Class Pelecypoda
  73. What is another name for class pelecypoda
    bivalves
  74. What us a notch between the anterior and dorsal sides that is the oldest part of the shall
    umbo
  75. How do pearls from?
    The form when a piece of sand gets into the mantle and then the mantle cavity starts to bulid around it
  76. What removes unwanted particles in the gills?
    Gill palps
  77. How are the proteins and fats digested in class pelecypoda?
    intercellular
  78. How are carbs digested in class pelecypoda?
    Extracellular
  79. What is the crystalline style do in the digestive system?
    Seperates proteins and fats from carbs

    Rolling the food mass and freeing digestive enzymes
  80. How do squids move?
    By forcefully expelling water from the mantle cavity through a ventral funnel that be pointed to control direction
  81. What is a common word for Phylum Annelida
    Segmented worms
  82. What does Annelid literal meaning?
    Little rings
  83. What are the examples in phylum Annelida
    Earthworms leeach and polychaete
  84. What is the key evoultionary advancement in phlyum Annelida?
    Metamerism (segmenation)
  85. What is the signifance of metamerism for annelids?
    • Movement
    • Redunacy
    • Advanced nervous system
  86. What is the habitat for phylum annelida
    Mostly Marine 2/3, and 1/3 fresh water
  87. What is the embryonic development of phylum annelida?
    Eucoelomates with protostome development
  88. What are the three classes of Phylum Annelida?
    • Polychaeta
    • Hirudinea
    • Hirudinea
  89. What is the general description of class polychaeta?
    Many bristles
  90. What is the habitat of class polycheata ?
    marine
  91. What are examples of class polucheata ?
    featherworms bristlesworms
  92. What is the general discripton of class hirudinrea ?
    No brisles
  93. What is the habitat of class hirudinea?
    Freshwater
  94. What are examples of class hirudinea?
    Leeches
  95. What is the general discription of Class oligochaeta?
    Few Bristles
  96. What is the habitat of class oliochaeta?
    Teristal and freshwater
  97. What are examples od class oligochaeata?
    Earthworms

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