Term
| Conversion of a non-specialized cell to a specialized cell? |
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Definition
| Cell differentiation- occurs when a cell splits into 4 due to electrical charge differences |
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| epithelial, connective-tissue, nerve, muscle |
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| selective secretion and absorption, protection |
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| initiate and conduct electrical signals to initiate other cells or stimulate |
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| generate mechanical forces of movement |
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| Type of tissue that is composed of cells of the greatest diversity in function and form? |
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Definition
| Connective: bone, cartilage, blood, adipose, ligaments, tendons |
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| simplest structural unit into which a complex organism can be divided and still retain the functional characteristics of life |
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| work together by composition of the 4 kinds of tissues arranged in various proportions and patterns |
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| a collection of organs that together perform an overall function |
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| aggregation of single type of specialized cells (cellular fabric part of organ) |
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| state of reasonably stable balance between physiological variables |
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Term
| Body's internal environment? |
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Definition
| Extracellular fluid which organ systems help to maintain homeostatsis and constancy such as body temp, bp, calcium levels, and osmotic pressure |
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Term
| Major fluid compartments? |
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Definition
| Intracellular fluid, extracellular fluid (interstitial fluid then plasma) |
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accelerate a process, increase stimulation
ex: parturition, blood clotting |
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responses that tend to move the variable in the opposite direction of original change
ex: constriction of blood vessels to conserve heat, firing of thirst center in brain when body water is lost |
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Definition
| involuntary and nearly instantaneous response to a stimulus |
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Term
| Components of reflex arc? |
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Definition
| receptor, afferent pathway, integration center, efferent pathway, effector |
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Definition
| way to measure variable, change |
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| takes a signal from receptor to integration center |
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| recognize value that is needed in body and thus decides what to do w/ info and controls activity |
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| sends signal determined by integration center to effector |
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| device to make change on body and carry out effects |
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Term
| How is constancy of internal environment maintained? Is it an absolutely constant level? |
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Definition
| Dynamic constancy is utilized. The average stays about the value of the set point but at any given moment there may be a range of values. this is used because your body's needs/functions vary throughout the day. |
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Term
| Set point/Operating point |
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Definition
| Normal operating ideal of a given variable which is maintained via homeostasis |
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| Body recognizes that its variable is off from the set point and then is returned to set point. |
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| Gain is exceeding loss. total amount of substance is increasing. |
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| loss is exceeding gain. Total amount of substance is decreasing. |
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