Final answer:
The statement regarding negative feedback is true; it counteracts a stimulus to maintain stability, such as in the regulation of blood glucose levels.
Step-by-step explanation:
The statement 'Negative feedback counteracts the effect of a stimulus and thereby abbreviates and limits the level of the response, making the system less sensitive to perturbations' is true.
Negative feedback involves a response to a stimulus in the opposite direction, aiming to restore stability to the system. In biology, this mechanism is essential for maintaining homeostasis, which is the stability of the body's internal environment.
When a physiological variable, like blood glucose level, deviates from its normal range (either too high or too low), the body engages in negative feedback to correct it. For example, if blood glucose levels are high, insulin is released to lower it. Conversely, if blood glucose is low, glucagon is released to increase it.
These actions illustrate how a negative feedback loop works to keep physiological variables within a set range, thereby promoting stability.
A negative feedback system typically has three components: a sensor or receptor, a control center, and an effector. The sensor detects changes in a physiological value, the control center compares it to the normal range and decides if corrective action is needed, and the effector makes the necessary adjustments to reverse the situation and return the value to the normal range. This process is crucial for processes like body temperature regulation and glucose control.