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Description
Flashcards by Ella-mentary, updated more than 1 year ago
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Created by Ella-mentary
over 8 years ago
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| Question | Answer |
| Cell Theory | All organisms are composed of cells. The smallest unit of life is a cell. All cells come from pre-existing cells. |
| Differentiation | The alteration of a cell's shape and function through gene expression. |
| Emergent Property | A property of a system that does not appear in any of its component parts. |
| Growth | An increase in physical size. |
| Homeostasis | Process by which organisms maintain a relatively stable internal environment. |
| Magnification | The ratio of image size to actual size. = (image size)/(specimen size) |
| Metabolism | All of the chemical reactions that occur within an organism or within a cell. |
| Micrometre (µm) | 1/1000 of a mm |
| Millimetre (mm) | 1/1000 of a metre |
| Nanometre (nm) | 1/1000 of a µm |
| Objective lens | The part of the microscope that is nearest to the object/specimen. |
| Paramecium | A single-celled organism. It moves using cilia and feeds using an oral groove. |
| Reductionism | Biological reductionism is the idea that you can explain complex processes by looking at the simple component parts. |
| Scale bar | A line on a microscope image which is labelled with the actual size of the line. From this the magnification can be calculated. |
| Stargardt's disease | A degenerative eye disease that has been the target of stem cell research. |
| Stem cells | Cells that divide and remain undifferentiated. Two types are totipotent and pluripotent. |
| Surface area:volume ratio | A ratio that decreases as cells grow larger. Above a certain size, cells do not have a large enough surface area to support the exchange of gases or nutrients to support the volume of the cell. |
| System | A level of organisation that includes organs, tissues, and cells. |
| Tissue | A group of similar cells with a common function and structure. |
| Life processes | Movement Growth Reproduction Sensitivity Excretion Nutrition Respiration Homeostasis |
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