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23 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Describe a Hypotonic Environment. |
Tends to cause a cell to swell or burst as water enters the cell. |
https://youtu.be/rMa9MzP19zI |
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Describe a Hypertonic environment. |
Tends to cause a cell to shrivel or collapse as water exits the cell. |
https://youtu.be/rMa9MzP19zIDescrive |
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Describe an isotonic environment. |
Balanced so water enters and leaves cells at the same rate. |
https://youtu.be/rMa9MzP19zI |
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What are the three types of osmotic environments? |
Isotonic, hypotonic, and hypertonic. |
https://youtu.be/rMa9MzP19zI |
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True or False. Diffusion is one of the processes whereby materials are exchanged between a cell and its environment. |
True. |
https://youtu.be/c_IYK8sy0QA |
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True and False. The molecules in a solid lump of sugar do not move. |
False. |
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True or False. Hypertonic solutions can be used clinically to reduce edema. |
True. |
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True or False. If a cell is placed in an isotonic solution, there will be no net movement. |
True. |
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True or False. A 5% dextrose solution is hypotonic solution. |
False. A 5% dextrose solution is hypertonic. |
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True or False. Facilitated Diffusion requires a specific transporter for a specific molecule. |
True. |
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True or False. Unlike simple diffusion, facilitated diffusion requires energy expenditure by the cell. |
False. |
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True or False. The sodium channels in the cell membrane have receptor sites for acetylcholine. |
True. |
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True or False. The binding and release of sodium or potassium ions are due to conformational changes in protein. |
True. |
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True or False. The sodium-potassium pump is a trans-membrane protein. |
True. |
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True or False. Taking excess insulin can trigger hypoglycemia. |
True. |
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True or False. The cell membrane is more permeable to sodium than any other cation. |
False. K+ Potassium is more permeable. |
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Describe Active Transport. |
Involves the movement of molecules from a low concentrations high concentration. |
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Describe Simple Diffusion. |
Involves the movement of lipid soluble molecules from a high concentration to a low concentration. |
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Describe Facilitated Diffusion. |
Includes the movement of small organic molecules through a protein located within the plasma membrane. |
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True or False. A change in membrane permeability or ion concentration will change the resting membrane potential. |
True. Since membrane potentials depend on the ion concentration on either side of the membrane which would change the permeability changes, both could then change the resting membrane potential. |
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Describe Chromatin. |
Chromatin contains the DNA of the cell bound to histones. |
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What is the proper order in which events occur during meiosis 1? |
1. Synapsid 2. Crossing over 3. Independent Assortment 4. Separation of homologous chromosomes |
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The number of cells produced by meiosis is _________ the number of cells produced by mitosis. |
twice |
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