Feedback Loops and Systems - Review

Front

What is a Positive Feedback Response?

Back

A process that amplifies or increases the effects of a system, moving it away from equilibrium. Example: When a cut occurs, hormones signal platelets to stop bleeding, leading to more platelets being activated.

Front

What is a Negative Feedback Loop?

Back

A process that counteracts changes in a system, helping to maintain stability and equilibrium. Example: When dehydrated, kidneys stop urine production to retain water and thin the blood.

Front

What does a Negative Feedback Loop do to a system?

Back

It makes a system more stable by reducing the effects of changes.

Front

What does a Positive Feedback Loop do to a system?

Back

It moves a system to an extreme by amplifying changes.

Front

Give an example of a Positive Feedback Loop in the human body.

Back

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

Front

Give an example of a Negative Feedback Loop in the human body.

Back

The regulation of body temperature: when body temperature rises, mechanisms are activated to cool the body down.

Front

What is the role of hormones in feedback loops?

Back

Hormones act as signals that trigger responses in the body to maintain homeostasis or amplify changes.

Front

How do feedback loops relate to homeostasis?

Back

Feedback loops are essential for maintaining homeostasis by regulating internal conditions in response to external changes.

Front

What happens in a system during a Positive Feedback Loop?

Back

The system's output enhances or increases the initial stimulus, leading to a greater response.

Front

What happens in a system during a Negative Feedback Loop?

Back

The system's output reduces or counteracts the initial stimulus, leading to a lesser response.