Knowra Homeostasis Homeostasis Homeostasis is the regulation of an organism’s internal conditions within viable limits despite changes in its environment. It relies on coordinated sensing and responses that counter disturbances or anticipate changing demands.
Negative feedback : A control process in which a response reduces the deviation that triggered it. Most homeostatic loops counter a disturbance by reversing its effect on a regulated variable.
Receptor (biological) : A biological structure or molecule that detects a stimulus or binds a specific signal. Homeostatic control begins when receptors detect changes in internal or external conditions.
Blood glucose regulation : The hormonal regulation of glucose concentration in the blood. Insulin and glucagon counter changes in blood glucose after meals and during fasting.
Physiological stress : A bodily response to demands that challenge or alter an organism’s normal functioning. Stress responses mobilize resources to meet demands while affecting regulated systems.
Positive feedback : A control process in which a response amplifies the change that triggered it. It can drive a process to completion, but usually does not stabilize an internal condition.
Control system : A set of components that monitors a process and directs actions to influence it. Homeostasis is a biological instance of control through sensing, comparison, and response.
Blood pressure regulation : The physiological control of the pressure exerted by circulating blood on vessel walls. Nervous, hormonal, and renal responses help stabilize circulation as demands change.
Homeostatic imbalance : A disruption in the regulation of internal conditions that can impair normal function. Persistent imbalance can contribute to disease or exceed an organism’s capacity to compensate.
Set point : A target value or range that a control system uses to regulate a variable. Homeostatic targets can shift with time, context, or physiological state.
Effector (biology) : A muscle, gland, or other structure that carries out a response to a signal. Effectors alter conditions such as temperature, blood pressure, or fluid balance.
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