Protists Flashcards
Where does the name protists come from
comes from the Greek for “first animals
How many species are single celled organisms?
65,000 species
Are protists harmful and where can they be found
Most are harmless, free-living inhabitants of water and soil
How many protists are involved in infection every year?
A few species of parasites are responsible for hundreds of millions of infections each year.
Classification of protists. How many groups are there and what are they?
4 groups
- Ciliates
- Flagellates
-Apicomplexans
-Amoeboids
What is the classification of protists based on?
locomotory organs
For ex. Ciliates- have cilia
Flagellates- flagella
Ampicomplexans- no locomotory organs
Amoeboids-pseudopods
Give me examples of Ciliates
- Flagellates
-Apicomplexans
-Amoeboids
Ciliates- paramecium
- Flagellates- euglena
-Apicomplexans- plasmodium
-Amoeboid- amoeba
All protists are single-celled and contain containing all of the major eukaryotic organelles except
chloroplasts
The cytoplasm of protists are divided into 2 parts. What are they?
Ectoplasm and endoplasm
Describe the ecto and endoplasms
Ectoplasm: clear outer layer involved in locomotion, feeding, and protection
Endoplasm: granular inner region housing the nucleus, mitochondria, and food and contractile vacuoles
Some organelles act as a _________ to coordinate movements
primitive nervous system
Function of cell membrane in protists
regulates food, water, and secretions.
Cell shape can remain constant or change constantly. Give examples of which species does this
remain constant (most ciliates)
change constantly (most amoebas).
Protists are pretty bid. Bigger than bacteria. Give there size
Size of most protozoans range from 3 – 300 μm:
Giant amoebas range from 3 – 4 mm
