Ch2 : Protista (Amoeba) Flashcards

1
Q

What kingdom?

A

Protista

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2
Q

Autotroph or heterotroph
omnivore, carnivore or herbivore

A

Heterotroph
Omnivore

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3
Q

Name the parts of the Amoeba

A

-Cell membrane
-cytolpasm(endoplasm and ectoplasm)
-Nucleus
-Waste products
-Pseudopodia
-Fat droplets
-Food vacuole
-Contractile vacuole

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4
Q

Describe the cytoplasm

A

-Ectoplasm (outer): clear and stiff
-Endoplasm (inner): grainy due to food vacuoles and waste, more fluid, contains fat droplets

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5
Q

Describe the contractile vacuole

A

-Function: osmoregulation
-Needed because amoeba live in freshwater, so their cytoplasm is more concentrated than the environment (amoeba would burst)

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6
Q

Explain the process of osmoregulation

A
  1. Water enters due to osmosis
  2. Excess water enters the contractile vacuole
  3. Contractile vacuole swells
  4. Contractile vacuole touches the cell membrane
  5. Contractile vacuole expels excess water
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7
Q

Describe the food vacuoles

A

-Secretes acids and enzymes to kill and digest prey
-Digested material is absorbed from the food vacuoles into cytoplasm

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8
Q

Describe the pseudopodia

A

-They extend in the direction amoeba wants to move
-Endoplasm flows into pseudopodia to allow cell to move
-Also used to surround prey

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