HP 23-24 Feedback Loops

Front

What is a feedback loop?

Back

A feedback loop is a process in which the output of a system influences its own input, creating a cycle of cause and effect.

Front

What are the two main types of feedback loops?

Back

Positive feedback loops and negative feedback loops.

Front

Define a positive feedback loop.

Back

A positive feedback loop is a process where the output enhances or amplifies the initial stimulus, leading to an increase in the output.

Front

Define a negative feedback loop.

Back

A negative feedback loop is a process where the output reduces or counteracts the initial stimulus, leading to a decrease in the output.

Front

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

Back

During childbirth, the release of oxytocin increases contractions, which in turn leads to more oxytocin release.

Front

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

Back

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

Front

What is the role of hormones in feedback loops?

Back

Hormones act as signaling molecules that facilitate communication between different parts of the body in feedback loops.

Front

How do negative feedback loops maintain homeostasis?

Back

Negative feedback loops help maintain homeostasis by counteracting changes and keeping physiological parameters within a narrow range.

Front

What happens in a positive feedback loop when the desired outcome is achieved?

Back

The process continues until a specific goal is reached, after which the feedback loop is typically halted.

Front

What is the significance of feedback loops in biological systems?

Back

Feedback loops are crucial for regulating physiological processes and maintaining balance within biological systems.