Diabetes 3.4 and 3.5
About this set
Created by:
cdever on January 27, 2011
Classes:
PLTW Principles of Biomedical Sciences, Principles of Biomedical Science
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17 terms
Terms | Definitions |
|---|---|
 Feedback | Information obtained from the results of a process that is used in guiding the way that process is done. |
| Solvent | The dissolving agent of a solution. Water is the most versatile solvent known. |
| Solution | A liquid that is a homogeneous mixture of two or more substances. |
| Solute | A substance that is dissolved in a solution. |
| Positive Feedback | Feedback that tends to magnify a process or increase its output. |
| Osmosis | The movement of water across a selectively permeable membrane from an area of higher concentration to an area of lower concentration. |
| Negative Feedback | A primary mechanism of homeostasis, whereby a change in a physiological variable that is being monitored triggers a response that counteracts the initial fluctuation. |
| Isotonic | Having the same solute concentration as another solution. |
| Insulin | A protein hormone secreted by the pancreas that is essential for the metabolism of carbohydrates and the regulation of glucose levels in the blood. |
| Hypotonic | In comparing two solutions, referring to the one with a lower solute concentration. |
| Hypertonic | In comparing two solutions, referring to the one with a greater solute concentration. |
| Hormone | A product of living cells that circulates in blood and produces a specific often stimulatory effect on the activity of cells that are often far from the source of the hormone. |
| Homeostasis | The maintenance of relatively stable internal physiological conditions (as body temperature or the pH of blood) in higher animals under fluctuating environmental conditions. |
| Concentration Gradient | An increase or decrease in the density of a chemical substance in an area. Cells often maintain concentration gradients of ions across their membranes. When a gradient exists, the ions or other chemical substances involved tend to move from where they are more concentrated to where they are less concentrated. |
| Dietary | The kinds and amounts of food available to or eaten by an individual, group, or population. |
| Nutrient | A substance found in food that provides needed resources for cellular function. |
| Nutrition | The sum of the processes by which an animal takes in and utilizes food substances. |
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