Homeostasis, positive/negative
Terms
undefined, object
copy deck
- positive
- This control system is ____: works to amplify change. Not common. Ex- blood clot formation
- negative
- Homeostatic mechanisms operate to keep vital characteristics within the relatively narrow limits required for normal functions. (body temperature, glucose levels, oxygen levels, ion concentrations) uses ___ feedback mechanisms
- negative
- This control system is ____ : work to restore normal values of regulated variable. resists of opposes chance. This is common, used in homeostasis. Ex- thermoregulation
- lymph
- The internal environment consists of: interstitial fluid, blood plasma, ____ and cerebrospinal fluid
- disease
- Failure of homeostasis causes organ system malfunction which can lead to illness and ____
- blood plasma
- ___ ___ is the fluid portion of the blood
- lymph
- ___ is fluid in lymph vessels
- controlled
- ____ elements are elements that can be manipulated by the system to keep the regulated variable in normal range-blood vessels constrict to dilate, sweating etc.
- sensor
- ____ detects changes in the regulated variable and sends signal to a COMPACTOR (called feedback signal)
- extracellular fluid, internal
- The ____ ____ is the fluid outside the cell. It consists of the interstitial fluid that surrounds all the cells of the body, the blood plasma, lymph and cerebrospinal fluid. This is the ____ invironment!
- interstitial
- This fluid is fluid that surrounds and bathes each cell
- comparator
- ____ recieves feedback signals from sensor and compares that signal with the SET POINT (if different from the set point, it generates an error signal that goes to the CONTROLLER
- controller
- ____ monitors the error signal and responds by manipulating the controlled elements
- error signal
- The ___ ____ is a value that represents the difference between the set point and feedback signal. (If a thermostat is set on 70 and temperature in room is 68 we see the system come on to raise the temperature in the house) This also goes along with any biological variable. (blood pressure, body temperature, hormone levels, blood glucose, ion concentration, etc.)
- regulated
- ___ variable is body temperature, blood pressure, pH, etc.
- 2
- How many types of control system are their?
- true
- The bodys internal environment is maintained at a relatively constant composition, it maintains the "status quo", yet "very dynamic"-adapts to changes. Occurs in constantly changing environment and involves many body organisms. True or False
- constant
- Physiological systems strive to maintain a relatively ___ internal environment
- intracellular
- The ____ fluid is not part of the internal environment
- homeostasis
- In order for an organism to survive, the cells that compose the organism must be able to withstand changes to its external environment. This ability to maintain a stable internal environment is called ____