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Bio Lab exam 3 > Lab 9 > Flashcards

Lab 9 Flashcards

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Biology 101 flashcards
1
Q

Pseudocoelomate is associated with?

A

Nematoda

  • tube within a tube
  • body cavity located between themesoderm and endoderm
  • Psuedoceol
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2
Q

Coelomate is associated with?

A

Annelida:

  • body cavity develops within mesodermal layer
  • organs completely held by mesoderm
  • true coelom
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3
Q

Phylum Platyhelminthes characteristics

A
  • Dorsoventrally flattened
  • Cephalization: evolution of head/brain in anterior end of animals, through to be a result of bilateral symmetry
  • No circulatory system: diffusion limited as far as nutrient and oxygen transport(passive diffusion)
  • Monoecious: hermaphroditic
  • Regeneration
  • Many are parasitic: live within bodies of animals, (flukes, tapeworms)
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4
Q

Phylum: Platyhelminthes (flatworms)

  • Subphylum: Neodermata-Parasitic flukes
  • -Class Trematoda Characteristics?
A
  • Parasitize vertebrates-including humans
  • Endoprarasites-live inside hosts
    • adults lack cilia, eyespots, sensory organs
  • Ectoparasites-parasitize surface of their host
  • Complex lifecycle- usually involves two hosts
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5
Q

What are the to parts to the complex life cycle and an example?

A
  • intermediate host: Mollusk
    • if second intermediate host: usually a fish or arthropod
  • Definitive host: always a vertebrate
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6
Q

Platyhelmithes

Class: Ceromeromorpha (Parasitic Tapeworms)

A

Segmentation: flexibility, specialization of compartments.

Protolitid=chain of multiple cells

They have indeterminate growth

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7
Q

Beef tape worms are the most highly derived: True or False

A

True

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8
Q

Phylum Nematoda (round worms): Psuedocoelomates characteristics?

A
  • Hydrostatic skeleton: fluid pseudocoel is pressurized
  • only longitudinal muscles-sand and vinegar
  • so circulatory system or specialized gas exchange
  • complete digestive cavity (mouth, gut and anus)
  • some are dioecious
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9
Q

Phylum Nematoda Genus: trichinella give birth to …?

Where does it come from?

A

live young

under cooked meat

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10
Q

What is the Ascaris Lumbricoides like?

A
  • female is larger=sexual dimorphism
  • male has hooked posterior

-there is no mesoderm

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11
Q

Phylum Annelida: polychaetes, earthworms, and leeches have Coelomates-characteristics?

A
  • parasitic or free living
  • segmentation: specialization of segments
  • improve hydrostatic skeleton
  • circular and longitudinal muscles: facilitate movement
  • closed circulatory system: carries blood from segment to segment
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12
Q

What help the Polychaeta Marine worms move and what else are the used for? What do they have for segments?

A

parapodia and used for filter feeding.

sedi, none of the others have this.

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13
Q

The Acoelomate body is associated with?

A

platyhelmithes (flatworms: planarians, flukes, tapeworms)

  • lack an internal body cavity
  • digestive tract is incomplete
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14
Q

Pseudocoelomate is associated with? Characteristics?

A

Nematoda

  • body cavity located between mesoderm and endoderm
  • Psuedoceol
  • tube within a tube
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15
Q

Coelomate is associated with? Characteristics?

A

Annelida

  • body cavity develops whithin mesodermal layer
  • Organs completely held by mesoderm
  • True coelom
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16
Q

Platyhelminths which are Acoelomates are __________ flattened.

A

Dorsoventrally

17
Q

What does Cephalization of the Phylum Platyhelminthes mean?

A

evolution of head/brain in anterior end of animals, thought to be the resold of bilateral symmetry.

18
Q

Since the Platyhlminthes to not have a circulatory system; diffusion is limited as fare as nutrient and oxygen transport. So how does the platyhelminthe absorb the nutrients?

A

passive diffusion

19
Q

What kind of digestive cavity does the platyhelminthe have, and what does it mean?

A

incomplete digestive cavity: mouth=anus(blind digestion)

20
Q

Are the platyhelminths monecious? and what does it mean?

A

yes: means hermaphroditic

21
Q

Are platyhelminthes parasitic? if they are where do they live?

A

yes many of them are

they live within bodies of animals (flukes, tapeworms)

22
Q

Are the subphylum neodermata parasitic flukes as well as under the phylum Platyhelmithes?

A

Yes

23
Q

Subphylum: neodermata- class Trematoda are what kind of parasites?

A

parasitize vertebrates

24
Q

Define edopararasites

how are they able to do this?

What do the adults have and not have?

A

live inside host

possess epicuticle that resists their hosts digestive enzymes and immune defense

lack cilia, eyespots, sensory organs

25
Q

Define ectoparasites

A

parasitize surface of their host

26
Q

Define complex lifecycle

A

usually involves 2 hosts

  • intermediate host: mollusk
  • if 2nd intermediate host: usually a fish or arthropod
  • Definitive host: always a vertebrate.
27
Q

What is the class and phylum name for parasitic tapeworms?

What does segmentation allow for in the tapeworms?

A

Class: Cercomeromorpha
Phylum: Platyhelmithes

flexibility and specialization of compartments

28
Q

What is the most highly derived tapeworm?

A

beef tapeworm

29
Q

Phylum Nematoda (round worms): Psuedocoelomtes only have ___________ muscles.

A

Longitudinal

30
Q

What kind of skeleton do Nematoda (round worms) have?

A

Hydrostatic

31
Q

What do Nematoda have that the Platyhelmethes do not have?

What other specialization do they have?

A

Complete digestive cavity

Some are dioecious

32
Q

What class are Earthworms in?

A

Clitellata

33
Q

What class and phylum are Hirudinea-leaches in?

A

Phylum: Annelida
Class: Clitellata

34
Q

What is a characteristic of a Hirudinea-leech?

A

Dorsoventrally flattened

Anterior/posterior sucker for capturing/holding prey

35
Q

What characteristic do earthworms and hirudinea-leeches share?

A

monoecious-clitellum isn’t obvious except during reproduction (just in leeches)

Segmentation is also not as obvious

36
Q

What do the Hirudinea leeches have so that the blood can not clog?

A

Anticoagulant

Bio Lab exam 3 (3 decks)

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