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Definition
| The idea of homeostasis and maintenance of an internal environment. |
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| The (BLANK) is where all cells float and where all exchange occurs. |
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| What is the consistency of normal interstitial fluid? |
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| What is the consistency of interstitial fluid in edema? |
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| Within the interstitial fluid are different components; the different compositions are due to differences in (BLANK) and (BLANK). |
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Definition
| membrane permeability and the types of pumps/channels/transporters. |
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| The composition of the interstitial fluid determines the (BLANK). |
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| The basic structural and functional unit. |
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| Aggregation of similar cell types (muscle, nerve, epithelial, connective). |
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| Composed of the four kinds of tissue in various proportions; carry out a specific function. |
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| Group of organs that operate in a coordinated fashion to achieve a special function. |
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Term
| Constancy in an open system requires that our bodies... |
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Definition
| Employ mechanisms to maintain this. |
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Term
| Steady state systems require that any change be met with... |
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Definition
| Forces that oppose this change. |
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Term
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Definition
| Maintaining a constant environment. |
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| Example of homeostatic systems. |
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Definition
| Nutrients, osmolarity, acid/base, fluid volume, blood pressure, and temperature. |
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Term
| What system is the mainstay of homeostais? |
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Definition
| Negative feedback systems, closed loops. |
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Term
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Definition
| Controlled directly, by an input signal. The basic units of this type consist only of an amplifier and a motor. The amplifier receives a low- level input signal and amplifies it enough to drive the motor to perform the desired job. |
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Term
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Definition
| System in which some or all of its output is used as its input. |
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Term
| Feedback mediators are (BLANK) or (BLANK). |
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Definition
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Term
| Only circulating chemical is referred to as (BLANK). |
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Definition
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Term
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| A chemical messenger produced by one cell that enters the blood stream to act on another cell. |
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Term
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Definition
| A chemical messenger produced by one cell that acts on a close target cell and the chemical signal is broken down too quickly to be carried to other places of the body. |
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Term
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Definition
| A chemical product made by one cell that acts on that same cell. |
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Definition
| Secretes product into a duct (digestive enzymes from exocrine pancreas). |
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| Producer of hormones. Secretes product into the blood stream or the interstitial fluid (insulin from pancreas). |
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Term
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Definition
| The initiating event causes a change that amplifies or propagates the initiating event. "Good" example is oxytocin in birth. |
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Term
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Definition
| Predictive or anticipatory; responds to a measured disturbance in a pre-defined way and cannot be controlled. FASTER than negative feedback (responds before there has been an error in the input signal). |
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Term
| Negative feedback is the most (BLANK) system. |
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Definition
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Term
| Negative feedback is also calle (BLANK) because the error is used to determine the action. |
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Definition
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Term
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Definition
| The efficiency or sensitivity of a system for maintaining homeostasis. |
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| Larger gain means system response is (BLANK) for a given perturbation. |
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Definition
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Term
| Fluid intake is regulated by... |
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Definition
| Habits and thirst (osmocontrol systems). |
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Term
| Electrolyte intake is regulated by... |
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Definition
| Habits and blood pressure control systems. |
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Term
| Fluid and electrolyte OUTPUT is regulated by... |
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Definition
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