Question

With negative feedback, a change induces a response that ___________ tje change . a. increases b. reverses

Short answer

With negative feedback, a change induces a response that reverses the change.

Step-by-step solution

Understanding Negative Feedback

Negative feedback is a process where a system responds to a change by trying to bring the system back to its original state. This means that any change triggering a response results in the system working in the opposite direction to counteract the change.

Analyzing the Choices

The choices given are 'increases' and 'reverses'. We need to decide which of these words is consistent with the concept of negative feedback in a system.

Choosing the Correct Response Action

Since negative feedback aims to counteract or reduce the initial change so that the system returns to its baseline state, the correct action is to 'reverse' the change.

Key concepts

Homeostasis

The concept of homeostasis is essential to understanding how biological systems maintain stability. Homeostasis refers to the processes by which living organisms regulate their internal environment to maintain a stable, constant condition. Think of it like a thermostat in your home that keeps the temperature within a comfortable range, regardless of the weather outside.
In biological terms, homeostasis involves regulating factors like temperature, pH, and the balance of fluids and electrolytes. For example, our bodies work tirelessly to keep the temperature around 37°C (98.6°F). If it goes too high or too low, our body implements mechanisms to bring it back to the preferred level.
The importance of homeostasis cannot be overstated, as it is crucial for survival. Without it, cells and systems could be damaged or could fail to function properly. Imagine how challenging it would be if your body's internal conditions changed dramatically every time you stepped outside!

• Maintains stable internal conditions
• Essential for proper functioning of cells and systems
• Involves regulation of factors like temperature, pH, and fluid balance

System Regulation

System regulation refers to how biological systems use structured processes to control and maintain homeostasis. Just like traffic lights regulate the flow of vehicles to prevent chaos on the roads, biological systems have regulatory mechanisms to ensure stability and efficiency.
One of the critical components of system regulation is the use of sensors, control centers, and effectors. These elements work together to monitor changes and implement appropriate responses.

For example, consider how blood sugar levels are managed in the human body. Sensors in the pancreas detect high glucose levels and send signals to release insulin. Insulin acts as an effector to decrease glucose levels by promoting its uptake into cells, thereby restoring balance.

• Involves sensors, control centers, and effectors
• Ensures stability and prevents system disruption
• Crucial for maintaining efficient functioning

Feedback Mechanisms

Feedback mechanisms are the core processes that enable system regulation. They ensure that biological systems can react and adjust to changes efficiently. There are two main types of feedback mechanisms: negative and positive.

Negative feedback, as explained in the exercise, acts to reverse a change and bring the system back to its original state. An example of this is the regulation of body temperature. When it's too hot, the body sweats to cool down. When it's too cold, it shivers to generate heat.
Positive feedback, on the other hand, amplifies a change rather than reversing it. It is less common but can be important in processes such as childbirth, where hormone levels increase to intensify contractions.
Understanding these mechanisms is key to understanding how complex biological systems operate and maintain balance in the face of continual change.

• Involves both negative and positive feedback
• Negative feedback promotes stability
• Positive feedback can amplify change