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Week 1
Homeostasis
| Term | Definition |
|---|---|
| Homeostasis | relatively constant states maintain by the body. (balance) |
| Heart Rate Variability | indicated defect in cardiac regulatory mechanism that may produce disease or even death. |
| Set point/ Setpoint range | normal reading or range of normal |
| Feedback Control Loops | information- or feedback- may be transmitted in these control loops by nervous impulses or by specific chemical messenger. |
| Afferent | a signal is traveling towards a particular center or point of reference. |
| Efferent | the signal is moving away from a center or other point of reference. |
| Sensor | being able to identify the characteristics or condition being controlled. |
| Integrator | also known as integration center or control center of the feedback loop. |
| Effectors | organs; such as muscle or glands, that directly influence controlled physiological variables. |
| Hypothalamus | feedback information is relayed through the nerves to the "thermostat" in a part of the brain. |
| Negative Feedback | temperature regulation by action of a thermostatically regulated furnace. |
| Stimulus | change in a variable that elicits a reaction in a feedback. |
| Response | the reaction-operation of the effector in a feedback loop |
| Positive Feedback | possible control systems. |
| Oxytocin | pituitary gland to secreted hormone. |
| Circadian | daily cycles or rhythm |
| Feed-Forward | complexity of control systems throughout the body. |
| Intracellular Control | mechanisms operate at the cell level |
| Intrinsic Control | mechanisms operate at the tissue and organ levels. |
| Extrinsic Control | "outside" control and operates at the system and organism levels. |