Positive and Negative Feedback Loops

Front

What is a negative feedback loop?

Back

A process that counteracts a change, helping to maintain homeostasis by reducing the output or activity when a certain level is reached.

Front

What is a positive feedback loop?

Back

A process that amplifies a change, leading to an increase in the output or activity until a specific event occurs.

Front

Give an example of a negative feedback loop in the human body.

Back

Maintaining body temperature: When the body temperature rises, mechanisms like sweating are activated to cool it down.

Front

Give an example of a positive feedback loop in nature.

Back

Childbirth: The release of oxytocin increases contractions, which leads to more oxytocin being released.

Front

What is homeostasis?

Back

The ability of an organism to maintain a stable internal environment despite external changes.

Front

What is a stimulus?

Back

A change in the environment that triggers a response in an organism.

Front

What is a response?

Back

The action or change in behavior that occurs as a result of a stimulus.

Front

What happens when homeostasis is not maintained?

Back

It can lead to a lack of internal balance, difficulty in metabolism, and eventually death.

Front

What role does the hypothalamus play in homeostasis?

Back

It regulates body temperature, hunger, thirst, and other vital functions to maintain balance.

Front

How do feedback loops contribute to homeostasis?

Back

They help regulate physiological processes by either enhancing or reducing changes in the body.