Homeostasis and Feedback Loops

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

What is a feedback loop?

Back

A feedback loop is a biological mechanism in which the output of a system influences its own operation, often to maintain homeostasis.

Front

What is a negative feedback loop?

Back

A negative feedback loop is a process that counteracts a change in the body, helping to restore balance by correcting an imbalance in the opposite direction.

Front

What is a positive feedback loop?

Back

A positive feedback loop is a process that amplifies a change in the body, enhancing the original stimulus rather than counteracting it.

Front

How does the sensor function in homeostasis?

Back

The sensor detects changes in the internal environment and sends messages to the control center to initiate a response.

Front

What role does the control center play in homeostasis?

Back

The control center processes information received from the sensor and sends commands to the effector to restore balance.

Front

What is the role of effectors in homeostasis?

Back

Effectors are organs or cells that carry out the response directed by the control center to restore homeostasis.

Front

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

Back

An example is the regulation of blood glucose levels: when glucose levels rise, insulin is released to lower them.

Front

What happens during a positive feedback loop in childbirth?

Back

During childbirth, the release of oxytocin increases contractions, which leads to more oxytocin being released, enhancing the process.

Front

What is the difference between negative and positive feedback loops?

Back

Negative feedback loops work to reverse a change and restore balance, while positive feedback loops enhance a change.