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Zoology > Protozoan Groups > Flashcards

Protozoan Groups Flashcards

1
Q

Protozoa - Characteristics

  1. The kingdom Protista is undergoing \_\_\_\_\_\_ revisions
  2. `` eukaryotes, but many are colonial
  3. Internal specialization, often very complex
  4. Microscopic (colonials can be microscopic)
  5. All symmetries found in the “group”
  6. All feeding modes found in the “group”
A
  1. Major
  2. Unicellular
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2
Q

Kingdom Protista - habitats

Most are `` in any aquatic habitat-freshwater and marine, including thin films of moist soils

A

Free-living

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3
Q

Kingdom Protista - habitats

Algae are the base of the `` in aquatic habitats exposed to sunlight

A

Food web

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4
Q

Kingdom Protista - habitats

Parasitic protists have `` life cycles with multiple habitats, including multiple hosts

A

Complex

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5
Q

Protozoan characteristics

Why are most protozoans more complex than many of the cells in your body?

A

Because cells have various systems that take care of various parts whereas protozoans have to do everything to survive

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6
Q

Protozoan Characteristics

What is the term denoting structures found within a cell?

A

Organelles

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7
Q

Kingdom Protista - Nutrition

T/F: Protozoa are not heterotrophs

A

False

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8
Q

Kingdom Protista - Nutrition

T/F: Most protozoa are able to ingest whole prey

Prey includes smaller protozoa and maybe bacteria

A

True

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9
Q

Kingdom Protista - Nutrition

The process of protozoa eating is called ``

A

Phagocytosis

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10
Q

Protozoan Life Forms

Protozoa can be unicellular or ``

A

Colonial

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11
Q

Protozoan Life Forms

How does algae differ from plants?

A

They don’t have tissues

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12
Q

Protozoan reproduction

What are the two main types of asexual reproduction that occur in protozoa?

1: A form of mitotic division
2: Multiple fission/schizogany: Repeated nuclear divisions followed by simultanous cytokinesis

A
  1. Binary fission
  2. Multiple fission/schizogany
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13
Q

Protozoan reproduction

What are the two main types of sexual reproduction that occur in protozoa?

  1. The fertilization of one haploid gamete by another (i.e. Volvox)
  2. The mutual exchange of genetic material
A
  1. Syngamy
  2. Conjugation
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14
Q

Protozoan locomotion

``` are small, hairlike structures, usually very numerous

A

Cilia

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15
Q

Protozoan locomotion

Flagella have long, ``-like, few in number

A

Whip

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16
Q

Protozoan Locomotion

What are pseudopodia?

A

Fluid extensions of cell

17
Q

Protozoan Locomotion

What are characteristics of lobopodia?

Think Amoeba

A

Blunt, temporary

18
Q

Protozoan Locomotion

Axopodia has long, thin with `` rod

A

Rigid

19
Q

Protozoan Locomotion

Reticulopodia characteristics (2):

A
  1. Branching
  2. Net-like
20
Q

Protozoan gas exchange

How does gas exchange (respiration) occur in protozoans?

A

Through simple diffusion from high to low concentration

21
Q

Protozoan gas exchange

T/F: Diffusion occurs across the cell membrane which limits how large they can be because the surface-area-to-volume ratio decreases as they get bigger

A

True

22
Q

Protozoan excretion

What is excretion?

A

The removal of metabolic waste from cells/body

23
Q

Protozoan excretion

What is the major end product of protein metabolism in protozoans?

A

Ammonia

24
Q

Protozoan osmoregulation

What is osmoregulation?

A

Maintaining the appropriate solute/water balance (part of homestasis)

25
Q

Protozoan osmoregulation

What is the osmoregulatory challenge for freshwater protozoa?

A

Excess water through osmosis

26
Q

Protozoan osmoregulation

What is osmosis?

A

Similar to diffusion; a physical process to “even out” the concentration of a solute

27
Q

Protozoan osmoregulation

If the solute cannot move through a barrier what happens?

A

The water moves

28
Q

Protozoan osmoregulation

Freshwater protozoa use 1. vacoules to gather and eject excess water

A
  1. Contractile
29
Q

Protozoan osmoregulation

What is exocytosis?

A

The process in which freshwater protozoa use contractile vacoules to gather and eject excess water

30
Q

Phylum Euglenozoa

Euglenozoa have:
- a thick outer membrane called a 1.
- a locomotory 2.
- and some have 3. and a 4.

A
  1. Pellicle
  2. Flagellum
  3. Chlorophyll
  4. Red eyespot
31
Q

Protozoan osmoregulation

Euglenozoa are saprozoic (absorb 1.) and many are autotrophic (2.)

A
  1. Nutrients
  2. Photosynthesizers
32
Q

A parasitic Euglenozoan

Trypanosoma causes ???? in humans

A

African Sleeping Sickness

33
Q

A parasitic Euglenozoan

What is the vector of the protist Trypanosoma?

Think insect

A

The Tsetse fly

34
Q

A parasitic Euglenozoan

Trypanosoma is a 1-shape cell with an undulating membrane driven by a flagellum

A

Sickle

35
Q
A

Zoology (13 decks)

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