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Pre-class Osm_Tonicity

Pre-class Osm_Tonicity - a Into the amoeba because the...

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Pre-class Questions due Fri, 4/4/08. Please turn in your answers on this sheet when you come to class. You are expected to work alone but you can use your book, notes, ppt. 1. Which of the following substances contribute to the osmolarity of a cell? a. Nucleus of cell b. Mitochondria of cytoplasm c. Urea, glucose, salts of protoplasm d. Glucose, urea, collagenous fibers of cytoplasm 2. The amoeba in my pond has a concentration of 430 mosm. The pond water is 340 mosm. Which description is best suited for the amoeba and the pond? a. The pond and amoeba are both hyperosmotic b. The amoeba is hyperosmotic and the pond, hypoosmotic c. They are isosmotic d . The amoeba is hypoosmotic to the pond. 3. In which direction will water flow if the membrane is permeable to water?
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Unformatted text preview: a. Into the amoeba because the protist is hypotonic. b. Out of the amoeba because the protist is hypertonic. c. Out of the amoeba because the protist is hypotonic. d. Into the amoeba because the pond is hypotonic 4. The protonephridium of a planaria filters which of the following fluids? a. Blood only b. Interstitial fluid only c. Hemolymph d. Blood and interstitial fluid 5. A metanephridium: a. Filters blood and interstitial fluid b. Filters hemolymph c. Has flame cells d. Is found in insects 6. When osmosis occurs with water moving into a tubule (through the walls), the solution in the tubule is: a. Hyperosmotic b. Hypoosmotic c. Hypertonic d. Less concentrated than the surrounding area...
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