Question

In a negative feedback loop, a stimulus—a deviation from a set point—is resisted through a physiological process that returns the body to homeostasis true or false

Answer 1

It is true that a negative feedback loop helps maintain homeostasis in the body by resisting a stimulus that deviates from a set point through a physiological process. This system involves a stimulus, sensor, control center, and effector, working together to maintain internal conditions such as body temperature and blood glucose level within a normal range.

Step-by-step explanation:

In response to the student's question, it is true that in a negative feedback loop, a stimulus—a deviation from a set point—is resisted through a physiological process that returns the body to homeostasis. The main goal of a negative feedback loop is to maintain the equilibrium of the internal physical and chemical conditions within organisms. If the body detects a change from the normal levels, the feedback mechanism will trigger a response that seeks to re-establish the normal condition. For example, body temperature regulation operates on this principle. If body temperature rises, mechanisms such as sweating are triggered to cool the body down. Conversely, if body temperature drops, shivering and other processes are initiated to raise the temperature.

Let's break down the negative feedback loop into its components:

1. Stimulus: Any change from the normal range (set point), which must be corrected.
2. Sensor: Detects the deviation from the set point (e.g., thermoreceptors for body temperature).
3. Control Center: Processes the information from the sensor and determines the appropriate response (e.g., hypothalamus for temperature control).
4. Effector: Executes the response to correct the deviation (e.g., sweat glands, muscles).

Negative feedback mechanisms are crucial for maintaining homeostasis and are involved in regulating various physiological parameters such as blood glucose level and body temperature. When these mechanisms fail, a homeostatic imbalance may occur, potentially leading to diseases such as diabetes in the case of glucose regulation.

Answer 2

The statement that a negative feedback loop resists a stimulus to return the body to homeostasis is true, and this is integral to maintaining conditions like body temperature within a critical range for survival.

Step-by-step explanation:

In a negative feedback loop, a stimulus—a deviation from a set point—is indeed resisted through a physiological process that returns the body to homeostasis. This statement is true.

The negative feedback loop ensures that conditions such as body temperature or blood glucose levels do not deviate too far from a critical set point crucial for normal body function. To regulate body temperature, for instance, this feedback system may initiate responses that cause the body to heat up or cool down, returning the body temperature to a desirable range.

Homeostasis is the stable state of internal conditions maintained by living things, which is essential for survival and proper functioning. The maintenance of homeostasis occurs primarily through negative feedback loops, which involve sensors detecting changes and effectors carrying out the necessary response to correct any deviation.