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BI 411 Ch. 12
| Question | Answer |
|---|---|
| Approximately how many freshwater species of sponges occur around the world? | 150 |
| Approximately how many marine species of sponges occur around the world? | most sponges |
| A term that refers to "pore-bearing." | porifera |
| Small incurrent pores are called | dermal ostia |
| Excurrent opening in a sponge | oscula (osculum) |
| A flagellated "collar cell." | choanocyte |
| A canal system in sponges where the choanocytes lie in a large chamber called the spongocoel. | asconoid |
| A canal system in sponges where the choanocytes lie in canals. | syconoid |
| A canal system in sponges where the choanocytes occupy distinct chambers. | leuconoid |
| Leucosolenia and Clathrina have what type of canal system? | asconoid |
| Calcarea and Hexactinellida have what type of canal system? | syconoid |
| The gelatinous matrix in a sponge is called what? | Mesohyl |
| What are the three classes of sponges? | Class Calcarea, Class Hexactinellida, Class Demospongiae |
| These two types of cells play a role in sponge feeding. | pinacocytes and archaeocytes |
| These cells form the pinacoderm, are flat epithelial-like cells, somewhat contractile, some are myocytes that help regulate flow of water | pinacocytes |
| The layer of pinacocytes in sponges in called what? | pinacoderm |
| A contractile cell in sponges is called what? | myocyte |
| This type of cell secretes spicules in sponges. | sclerocyte |
| This type of cell secretes spongin in sponges. | Spongocyte |
| This type of cell secretes fibrillar collagen in sponges. | Collencyte |
| This type of cell secretes collagen in sponges. | Lophocyte |
| When a sponge is cut into small fragments or if sponge cells are disassociated and fall into small groups, new sponges can develop by a process called... | somatic embryogenesis |
| What cells drive the passage of water (laden with oxygen and microscopic food) through the canals and spongocoel of the sponges? | choanocytes |
| Amoeboid cells that move about in the mesohyl and carry out a number of functions, including phagocytosis and spicule formation are called? | Archaeocytes |
| A freshwater sponge (Spongillidae), produces an unusual overwintering "bud" for the survival of the harsh conditions of winter. This bud is called a? | Gemmule |
| Sponges have a tremendous ability to repair injuries and to restore lost parts in a process called? | Regeneration |
| The members of the Class Hexactinellida are also called: | Glass sponges |
Created by:
gmoore730
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