Glossary of Science Test - Unit IV
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- What is an extotherm? Endotherm?
- ECTOTHERM: animal that relies on interactions with the enviornment to help control body tempertaure. ENDOTHERM: animal that generates its own body heat and controls its body temperature from within
- What is homeostasis? (essay)
- process by which organisms maintain a relatively stable internal enviornment
- What is an Animal?
- Mebers of the kingdom Animalia, are multicellular, eukaryotic herterotrophs whose cells lack cell walls
- What are the 7 essential functions animals do?
- Feeding, respiration, circulation, excretion, response, movement, reprodution
- What are the there germ layers and what types of cells will they be?
- Good question.
- What are the types of symmentry organisms will have?
- Radial symmetry (think bicycle wheel) or bilateral symmetry (think human)
- What is chephalization?
- concentration of sense organs and nerve cells at the anterior, or front, end of the body.
- What is the relationshp between the degree of chephalization and the complexity of the animal? (Essay)
- In general the more complex animlas become, the more pronounced their degree of chephalization.
- What is a coelom?
- Fluid Filled body cavity lined with mesoderm
- What is Introcellular/Extracellular Digestion?
- INTROCELLULAR DIGESTION: food is digested inside the cells. EXTRACELLULAR DIGESTION: food is broken down outside the cells in a digestive cavity or tract and then absorbed into the body.
- What is the difference between gastrovascular cavity and a 2 opening digestive system?
- GASTROVASCULAR CAVITY: a digestive chamber with one opening where food enters and waste leaves. TWO OPENING DIGESTIVE SYSTEM: ???
- What are the ways organisms carry out respiration?
- Diffusion, gills, tracheal tubes, book lungs
- What is a open/closed circulatory system?
- OPEN CIRCULATORY SYSTEM: system in which blood is not always contained within a network of blood vessels. CLOSED CIRCULATORY SYSTEM: system in which blood is contained within a network of blood vessels.
- What is the difference between a single-loop and a double loop circulatory system?
- Single loop goes through the heart once (body-heart-lungs-body) while the double loops gothrough twice (body-heart-lungs-heart-body).
- What is the advantage to a double loop circulatory system? (essay)
- Because it brings the oxygen poor blood to the lungs to get more, and the oxygen rich blood to the blood to supply oxygen. (check this)
- What are the three types of ways that animals can move?
- hydrostatiz, exoskeletons, endoskeletons
- What is the kidney used for?
- organ that removes urea, excess water, and other waste products from the blood and passes them to the ureter.
- What is a food chain?
- series of steps in an ecosystem in which organism transfer energy by eating and being eaten
- Fod Web?
- network of complex interactions formed by the feeding relationships among the various orangisms in an ecosystem
- Trophic Level?
- step in a food chain or web
- organism that can capture energy from sunlight or chamicals and use it to produce food from inorganic compounds
- organism that relies of other organisms for its energy and food supply.
- What are the main chaercteristics of sponges?
- multicellular, heterotrophs, have no cell walls, and contain a few specialized cells
- What is a sponge's symmetry?
- radial symmetry
- What do sponge's respiration, circulation, and excretion rely on?
- the movement through water (diffusion)
- What are choanocytes?
- Specialized cell in sponges that uses a flagellum to move a steady current of water through the sponge.
- What phyla do sponges belong to?
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