Bistability in a biological system can be accompanied by hysteresis. Consider switchlike cellular responses to a signal molecule, as shown in the following graphs. In each graph, the solid curve corresponds to the change in cellular response when the signal concentration is being increased over time, whereas the dashed curve corresponds to the change when the signal concentration is being decreased. Which graph do you think corresponds to a system with a greater degree of hysteresis? What mechanism is responsible for this behavior? 
Definitions:
Anchoring And Adjustment
A cognitive bias where an individual depends too heavily on an initial piece of information (anchor) when making decisions and makes insufficient adjustments based on subsequent information.
Availability
The degree to which a system, service, or product is operational and accessible when required for use.
Projection
A psychological defense mechanism where an individual ascribes their own unacceptable desires, impulses, or thoughts onto another person or group.
Representativeness
The degree to which a sample or instance accurately reflects the characteristics of a larger group.
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